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</pre><pre class="rust"><code><span class="doccomment">//! The sim crate runs a traffic simulation on top of the map_model. See also</span>
<span class="doccomment">//! https://a-b-street.github.io/docs/tech/trafficsim/index.html.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! The simulation is very roughly layered into two pieces: the low-level &quot;mechanics&quot; of simulating</span>
<span class="doccomment">//! individual agents over time, and higher-level systems like TripManager and TransitSimState that</span>
<span class="doccomment">//! glue together individual goals executed by the agents.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! Helpful terminology:</span>
<span class="doccomment">//! - sov = single occupancy vehicle, a car with just a driver and no passengers. (Car passengers</span>
<span class="doccomment">//!   are not currently modelled)</span>

<span class="comment">// Disable some noisy clippy warnings</span>
<span class="attribute">#![<span class="ident">allow</span>(<span class="ident">clippy::type_complexity</span>, <span class="ident">clippy::too_many_arguments</span>)]</span>

<span class="attribute">#[<span class="ident">macro_use</span>]</span>
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">anyhow</span>;
<span class="attribute">#[<span class="ident">macro_use</span>]</span>
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">log</span>;

<span class="kw">use</span> <span class="ident">std::fmt</span>;

<span class="kw">use</span> <span class="ident">serde</span>::{<span class="ident">Deserialize</span>, <span class="ident">Serialize</span>};

<span class="kw">use</span> <span class="ident">abstutil</span>::{<span class="ident">deserialize_usize</span>, <span class="ident">serialize_usize</span>};
<span class="kw">use</span> <span class="ident">geom</span>::{<span class="ident">Distance</span>, <span class="ident">Speed</span>, <span class="ident">Time</span>};
<span class="kw">use</span> <span class="ident">map_model</span>::{
    <span class="ident">BuildingID</span>, <span class="ident">IntersectionID</span>, <span class="ident">LaneID</span>, <span class="ident">Map</span>, <span class="ident">ParkingLotID</span>, <span class="ident">Path</span>, <span class="ident">PathConstraints</span>, <span class="ident">Position</span>,
    <span class="ident">TransitRouteID</span>, <span class="ident">TransitStopID</span>,
};
<span class="kw">use</span> <span class="ident">synthpop::TripEndpoint</span>;

<span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::render</span>::{
    <span class="ident">CarStatus</span>, <span class="ident">DrawCarInput</span>, <span class="ident">DrawPedCrowdInput</span>, <span class="ident">DrawPedestrianInput</span>, <span class="ident">Intent</span>, <span class="ident">PedCrowdLocation</span>,
    <span class="ident">UnzoomedAgent</span>,
};

<span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="self">self</span>::analytics</span>::{<span class="ident">Analytics</span>, <span class="ident">Problem</span>, <span class="ident">ProblemType</span>, <span class="ident">SlidingWindow</span>, <span class="ident">TripPhase</span>};
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">use</span> <span class="ident"><span class="self">self</span>::events::Event</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="self">self</span>::events</span>::{<span class="ident">AlertLocation</span>, <span class="ident">TripPhaseType</span>};
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="self">self</span>::make</span>::{<span class="ident">fork_rng</span>, <span class="ident">BorderSpawnOverTime</span>, <span class="ident">ScenarioGenerator</span>, <span class="ident">SimFlags</span>, <span class="ident">SpawnOverTime</span>};
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">use</span> <span class="ident"><span class="self">self</span>::make</span>::{<span class="ident">StartTripArgs</span>, <span class="ident">TripSpec</span>};
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">use</span> <span class="ident"><span class="self">self</span>::mechanics</span>::{
    <span class="ident">DrivingSimState</span>, <span class="ident">IntersectionSimState</span>, <span class="ident">ParkingSim</span>, <span class="ident">ParkingSimState</span>, <span class="ident">WalkingSimState</span>,
};
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">use</span> <span class="ident"><span class="self">self</span>::pandemic::PandemicModel</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="self">self</span>::prebake::PrebakeSummary</span>;
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">use</span> <span class="ident"><span class="self">self</span>::recorder::TrafficRecorder</span>;
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">use</span> <span class="ident"><span class="self">self</span>::router</span>::{<span class="ident">ActionAtEnd</span>, <span class="ident">Router</span>};
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">use</span> <span class="ident"><span class="self">self</span>::scheduler</span>::{<span class="ident">Command</span>, <span class="ident">Scheduler</span>};
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="self">self</span>::sim</span>::{
    <span class="ident">count_parked_cars_per_bldg</span>, <span class="ident">rand_dist</span>, <span class="ident">AgentProperties</span>, <span class="ident">AlertHandler</span>, <span class="ident">DelayCause</span>, <span class="ident">Sim</span>,
    <span class="ident">SimCallback</span>, <span class="ident">SimOptions</span>,
};
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">use</span> <span class="ident"><span class="self">self</span>::transit::TransitSimState</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="self">self</span>::trips</span>::{<span class="ident">CommutersVehiclesCounts</span>, <span class="ident">Person</span>, <span class="ident">PersonState</span>, <span class="ident">TripInfo</span>, <span class="ident">TripResult</span>};
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">use</span> <span class="ident"><span class="self">self</span>::trips</span>::{<span class="ident">TripLeg</span>, <span class="ident">TripManager</span>};

<span class="kw">mod</span> <span class="ident">analytics</span>;
<span class="kw">mod</span> <span class="ident">events</span>;
<span class="kw">mod</span> <span class="ident">make</span>;
<span class="kw">mod</span> <span class="ident">mechanics</span>;
<span class="kw">mod</span> <span class="ident">pandemic</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">prebake</span>;
<span class="kw">mod</span> <span class="ident">recorder</span>;
<span class="kw">mod</span> <span class="ident">render</span>;
<span class="kw">mod</span> <span class="ident">router</span>;
<span class="kw">mod</span> <span class="ident">scheduler</span>;
<span class="kw">mod</span> <span class="ident">sim</span>;
<span class="kw">mod</span> <span class="ident">transit</span>;
<span class="kw">mod</span> <span class="ident">trips</span>;

<span class="comment">// http://pccsc.net/bicycle-parking-info/ says 68 inches, which is 1.73m</span>
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const</span> <span class="ident">BIKE_LENGTH</span>: <span class="ident">Distance</span> <span class="op">=</span> <span class="ident">Distance::const_meters</span>(<span class="number">1.8</span>);
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const</span> <span class="ident">MIN_CAR_LENGTH</span>: <span class="ident">Distance</span> <span class="op">=</span> <span class="ident">Distance::const_meters</span>(<span class="number">4.5</span>);
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const</span> <span class="ident">MAX_CAR_LENGTH</span>: <span class="ident">Distance</span> <span class="op">=</span> <span class="ident">Distance::const_meters</span>(<span class="number">6.5</span>);
<span class="comment">// Note this is more than MAX_CAR_LENGTH</span>
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const</span> <span class="ident">BUS_LENGTH</span>: <span class="ident">Distance</span> <span class="op">=</span> <span class="ident">Distance::const_meters</span>(<span class="number">12.5</span>);
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const</span> <span class="ident">LIGHT_RAIL_LENGTH</span>: <span class="ident">Distance</span> <span class="op">=</span> <span class="ident">Distance::const_meters</span>(<span class="number">60.0</span>);

<span class="doccomment">/// At all speeds (including at rest), cars must be at least this far apart, measured from front of</span>
<span class="doccomment">/// one car to the back of the other.</span>
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const</span> <span class="ident">FOLLOWING_DISTANCE</span>: <span class="ident">Distance</span> <span class="op">=</span> <span class="ident">Distance::const_meters</span>(<span class="number">1.0</span>);

<span class="doccomment">/// When spawning at borders, start the front of the vehicle this far along and gradually appear.</span>
<span class="doccomment">/// Getting too close to EPSILON_DIST can lead to get_draw_car having no geometry at all.</span>
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const</span> <span class="ident">SPAWN_DIST</span>: <span class="ident">Distance</span> <span class="op">=</span> <span class="ident">Distance::const_meters</span>(<span class="number">0.05</span>);

<span class="comment">// TODO Implement Eq, Hash, Ord manually to guarantee this.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Debug</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">CarID</span> {
    <span class="doccomment">/// The numeric ID must be globally unique, without considering VehicleType.</span>
    <span class="attribute">#[<span class="ident">serde</span>(
        <span class="ident">serialize_with</span> <span class="op">=</span> <span class="string">&quot;serialize_usize&quot;</span>,
        <span class="ident">deserialize_with</span> <span class="op">=</span> <span class="string">&quot;deserialize_usize&quot;</span>
    )]</span>
    <span class="kw">pub</span> <span class="ident">id</span>: <span class="ident">usize</span>,
    <span class="doccomment">/// VehicleType is bundled for convenience; many places need to know this without a lookup.</span>
    <span class="kw">pub</span> <span class="ident">vehicle_type</span>: <span class="ident">VehicleType</span>,
}

<span class="kw">impl</span> <span class="ident">fmt::Display</span> <span class="kw">for</span> <span class="ident">CarID</span> {
    <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;mut</span> <span class="ident">fmt::Formatter</span>) -&gt; <span class="ident">fmt::Result</span> {
        <span class="kw">match</span> <span class="self">self</span>.<span class="ident">vehicle_type</span> {
            <span class="ident">VehicleType::Car</span> =&gt; <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;Car #{}&quot;</span>, <span class="self">self</span>.<span class="ident">id</span>),
            <span class="ident">VehicleType::Bus</span> =&gt; <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;Bus #{}&quot;</span>, <span class="self">self</span>.<span class="ident">id</span>),
            <span class="ident">VehicleType::Train</span> =&gt; <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;Train #{}&quot;</span>, <span class="self">self</span>.<span class="ident">id</span>),
            <span class="ident">VehicleType::Bike</span> =&gt; <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;Bike #{}&quot;</span>, <span class="self">self</span>.<span class="ident">id</span>),
        }
    }
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Debug</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">PedestrianID</span>(
    <span class="attribute">#[<span class="ident">serde</span>(
        <span class="ident">serialize_with</span> <span class="op">=</span> <span class="string">&quot;serialize_usize&quot;</span>,
        <span class="ident">deserialize_with</span> <span class="op">=</span> <span class="string">&quot;deserialize_usize&quot;</span>
    )]</span>
    <span class="kw">pub</span> <span class="ident">usize</span>,
);

<span class="kw">impl</span> <span class="ident">fmt::Display</span> <span class="kw">for</span> <span class="ident">PedestrianID</span> {
    <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;mut</span> <span class="ident">fmt::Formatter</span>) -&gt; <span class="ident">fmt::Result</span> {
        <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;Pedestrian #{}&quot;</span>, <span class="self">self</span>.<span class="number">0</span>)
    }
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Debug</span>, <span class="ident">Hash</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">AgentID</span> {
    <span class="ident">Car</span>(<span class="ident">CarID</span>),
    <span class="ident">Pedestrian</span>(<span class="ident">PedestrianID</span>),
    <span class="comment">// TODO Rename...</span>
    <span class="ident">BusPassenger</span>(<span class="ident">PersonID</span>, <span class="ident">CarID</span>),
}

<span class="kw">impl</span> <span class="ident">AgentID</span> {
    <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">as_car</span>(<span class="self">self</span>) -&gt; <span class="ident">CarID</span> {
        <span class="kw">match</span> <span class="self">self</span> {
            <span class="ident">AgentID::Car</span>(<span class="ident">id</span>) =&gt; <span class="ident">id</span>,
            <span class="kw">_</span> =&gt; <span class="macro">panic!</span>(<span class="string">&quot;Not a CarID: {:?}&quot;</span>, <span class="self">self</span>),
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_type</span>(<span class="self">self</span>) -&gt; <span class="ident">AgentType</span> {
        <span class="kw">match</span> <span class="self">self</span> {
            <span class="ident">AgentID::Car</span>(<span class="ident">c</span>) =&gt; <span class="kw">match</span> <span class="ident">c</span>.<span class="ident">vehicle_type</span> {
                <span class="ident">VehicleType::Car</span> =&gt; <span class="ident">AgentType::Car</span>,
                <span class="ident">VehicleType::Bike</span> =&gt; <span class="ident">AgentType::Bike</span>,
                <span class="ident">VehicleType::Bus</span> =&gt; <span class="ident">AgentType::Bus</span>,
                <span class="ident">VehicleType::Train</span> =&gt; <span class="ident">AgentType::Train</span>,
            },
            <span class="ident">AgentID::Pedestrian</span>(<span class="kw">_</span>) =&gt; <span class="ident">AgentType::Pedestrian</span>,
            <span class="ident">AgentID::BusPassenger</span>(<span class="kw">_</span>, <span class="kw">_</span>) =&gt; <span class="ident">AgentType::TransitRider</span>,
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_vehicle_type</span>(<span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">VehicleType</span><span class="op">&gt;</span> {
        <span class="kw">match</span> <span class="self">self</span> {
            <span class="ident">AgentID::Car</span>(<span class="ident">c</span>) =&gt; <span class="prelude-val">Some</span>(<span class="ident">c</span>.<span class="ident">vehicle_type</span>),
            <span class="ident">AgentID::Pedestrian</span>(<span class="kw">_</span>) =&gt; <span class="prelude-val">None</span>,
            <span class="ident">AgentID::BusPassenger</span>(<span class="kw">_</span>, <span class="kw">_</span>) =&gt; <span class="prelude-val">None</span>,
        }
    }

    <span class="comment">// Convenient debugging</span>
    <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused</span>)]</span>
    <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">is_car</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">id</span>: <span class="ident">usize</span>) -&gt; <span class="ident">bool</span> {
        <span class="kw">match</span> <span class="self">self</span> {
            <span class="ident">AgentID::Car</span>(<span class="ident">c</span>) =&gt; <span class="ident">c</span>.<span class="ident">id</span> <span class="op">==</span> <span class="ident">id</span>,
            <span class="kw">_</span> =&gt; <span class="bool-val">false</span>,
        }
    }

    <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">is_pedestrian</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="ident">bool</span> {
        <span class="macro">matches!</span>(<span class="self">self</span>, <span class="ident">AgentID::Pedestrian</span>(<span class="kw">_</span>))
    }
}

<span class="kw">impl</span> <span class="ident">fmt::Display</span> <span class="kw">for</span> <span class="ident">AgentID</span> {
    <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;mut</span> <span class="ident">fmt::Formatter</span>) -&gt; <span class="ident">fmt::Result</span> {
        <span class="kw">match</span> <span class="self">self</span> {
            <span class="ident">AgentID::Car</span>(<span class="ident">id</span>) =&gt; <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;AgentID({})&quot;</span>, <span class="ident">id</span>),
            <span class="ident">AgentID::Pedestrian</span>(<span class="ident">id</span>) =&gt; <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;AgentID({})&quot;</span>, <span class="ident">id</span>),
            <span class="ident">AgentID::BusPassenger</span>(<span class="ident">person</span>, <span class="ident">bus</span>) =&gt; <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;AgentID({} on {})&quot;</span>, <span class="ident">person</span>, <span class="ident">bus</span>),
        }
    }
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Debug</span>, <span class="ident">Hash</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">AgentType</span> {
    <span class="ident">Car</span>,
    <span class="ident">Bike</span>,
    <span class="ident">Bus</span>,
    <span class="ident">Train</span>,
    <span class="ident">Pedestrian</span>,
    <span class="ident">TransitRider</span>,
}

<span class="kw">impl</span> <span class="ident">AgentType</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">all</span>() -&gt; <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">AgentType</span><span class="op">&gt;</span> {
        <span class="macro">vec!</span>[
            <span class="ident">AgentType::Car</span>,
            <span class="ident">AgentType::Bike</span>,
            <span class="ident">AgentType::Bus</span>,
            <span class="ident">AgentType::Train</span>,
            <span class="ident">AgentType::Pedestrian</span>,
            <span class="ident">AgentType::TransitRider</span>,
        ]
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">noun</span>(<span class="self">self</span>) -&gt; <span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> <span class="ident">str</span> {
        <span class="kw">match</span> <span class="self">self</span> {
            <span class="ident">AgentType::Car</span> =&gt; <span class="string">&quot;Car&quot;</span>,
            <span class="ident">AgentType::Bike</span> =&gt; <span class="string">&quot;Bike&quot;</span>,
            <span class="ident">AgentType::Bus</span> =&gt; <span class="string">&quot;Bus&quot;</span>,
            <span class="ident">AgentType::Train</span> =&gt; <span class="string">&quot;Train&quot;</span>,
            <span class="ident">AgentType::Pedestrian</span> =&gt; <span class="string">&quot;Pedestrian&quot;</span>,
            <span class="ident">AgentType::TransitRider</span> =&gt; <span class="string">&quot;Transit rider&quot;</span>,
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">plural_noun</span>(<span class="self">self</span>) -&gt; <span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> <span class="ident">str</span> {
        <span class="kw">match</span> <span class="self">self</span> {
            <span class="ident">AgentType::Car</span> =&gt; <span class="string">&quot;cars&quot;</span>,
            <span class="ident">AgentType::Bike</span> =&gt; <span class="string">&quot;bikes&quot;</span>,
            <span class="ident">AgentType::Bus</span> =&gt; <span class="string">&quot;buses&quot;</span>,
            <span class="ident">AgentType::Train</span> =&gt; <span class="string">&quot;trains&quot;</span>,
            <span class="ident">AgentType::Pedestrian</span> =&gt; <span class="string">&quot;pedestrians&quot;</span>,
            <span class="ident">AgentType::TransitRider</span> =&gt; <span class="string">&quot;transit riders&quot;</span>,
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ongoing_verb</span>(<span class="self">self</span>) -&gt; <span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> <span class="ident">str</span> {
        <span class="kw">match</span> <span class="self">self</span> {
            <span class="ident">AgentType::Car</span> =&gt; <span class="string">&quot;driving&quot;</span>,
            <span class="ident">AgentType::Bike</span> =&gt; <span class="string">&quot;biking&quot;</span>,
            <span class="ident">AgentType::Bus</span> <span class="op">|</span> <span class="ident">AgentType::Train</span> =&gt; <span class="macro">unreachable!</span>(),
            <span class="ident">AgentType::Pedestrian</span> =&gt; <span class="string">&quot;walking&quot;</span>,
            <span class="ident">AgentType::TransitRider</span> =&gt; <span class="string">&quot;riding transit&quot;</span>,
        }
    }
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Debug</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">TripID</span>(
    <span class="attribute">#[<span class="ident">serde</span>(
        <span class="ident">serialize_with</span> <span class="op">=</span> <span class="string">&quot;serialize_usize&quot;</span>,
        <span class="ident">deserialize_with</span> <span class="op">=</span> <span class="string">&quot;deserialize_usize&quot;</span>
    )]</span>
    <span class="kw">pub</span> <span class="ident">usize</span>,
);

<span class="kw">impl</span> <span class="ident">abstutil::CloneableAny</span> <span class="kw">for</span> <span class="ident">TripID</span> {}

<span class="kw">impl</span> <span class="ident">fmt::Display</span> <span class="kw">for</span> <span class="ident">TripID</span> {
    <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;mut</span> <span class="ident">fmt::Formatter</span>) -&gt; <span class="ident">fmt::Result</span> {
        <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;Trip #{}&quot;</span>, <span class="self">self</span>.<span class="number">0</span>)
    }
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Debug</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">PersonID</span>(
    <span class="attribute">#[<span class="ident">serde</span>(
        <span class="ident">serialize_with</span> <span class="op">=</span> <span class="string">&quot;serialize_usize&quot;</span>,
        <span class="ident">deserialize_with</span> <span class="op">=</span> <span class="string">&quot;deserialize_usize&quot;</span>
    )]</span>
    <span class="kw">pub</span> <span class="ident">usize</span>,
);

<span class="kw">impl</span> <span class="ident">fmt::Display</span> <span class="kw">for</span> <span class="ident">PersonID</span> {
    <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;mut</span> <span class="ident">fmt::Formatter</span>) -&gt; <span class="ident">fmt::Result</span> {
        <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;Person {}&quot;</span>, <span class="self">self</span>.<span class="number">0</span>)
    }
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Debug</span>, <span class="ident">Hash</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">VehicleType</span> {
    <span class="ident">Car</span>,
    <span class="ident">Bus</span>,
    <span class="ident">Train</span>,
    <span class="ident">Bike</span>,
}

<span class="kw">impl</span> <span class="ident">fmt::Display</span> <span class="kw">for</span> <span class="ident">VehicleType</span> {
    <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;mut</span> <span class="ident">fmt::Formatter</span>) -&gt; <span class="ident">fmt::Result</span> {
        <span class="kw">match</span> <span class="self">self</span> {
            <span class="ident">VehicleType::Car</span> =&gt; <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;car&quot;</span>),
            <span class="ident">VehicleType::Bus</span> =&gt; <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;bus&quot;</span>),
            <span class="ident">VehicleType::Train</span> =&gt; <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;train&quot;</span>),
            <span class="ident">VehicleType::Bike</span> =&gt; <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;bike&quot;</span>),
        }
    }
}

<span class="kw">impl</span> <span class="ident">VehicleType</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_constraints</span>(<span class="self">self</span>) -&gt; <span class="ident">PathConstraints</span> {
        <span class="kw">match</span> <span class="self">self</span> {
            <span class="ident">VehicleType::Car</span> =&gt; <span class="ident">PathConstraints::Car</span>,
            <span class="ident">VehicleType::Bus</span> =&gt; <span class="ident">PathConstraints::Bus</span>,
            <span class="ident">VehicleType::Train</span> =&gt; <span class="ident">PathConstraints::Train</span>,
            <span class="ident">VehicleType::Bike</span> =&gt; <span class="ident">PathConstraints::Bike</span>,
        }
    }

    <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">is_transit</span>(<span class="self">self</span>) -&gt; <span class="ident">bool</span> {
        <span class="kw">match</span> <span class="self">self</span> {
            <span class="ident">VehicleType::Car</span> =&gt; <span class="bool-val">false</span>,
            <span class="ident">VehicleType::Bus</span> =&gt; <span class="bool-val">true</span>,
            <span class="ident">VehicleType::Train</span> =&gt; <span class="bool-val">true</span>,
            <span class="ident">VehicleType::Bike</span> =&gt; <span class="bool-val">false</span>,
        }
    }
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">PartialEq</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Vehicle</span> {
    <span class="kw">pub</span> <span class="ident">id</span>: <span class="ident">CarID</span>,
    <span class="kw">pub</span> <span class="ident">owner</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">PersonID</span><span class="op">&gt;</span>,
    <span class="kw">pub</span> <span class="ident">vehicle_type</span>: <span class="ident">VehicleType</span>,
    <span class="kw">pub</span> <span class="ident">length</span>: <span class="ident">Distance</span>,
    <span class="kw">pub</span> <span class="ident">max_speed</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Speed</span><span class="op">&gt;</span>,
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">PartialEq</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">VehicleSpec</span> {
    <span class="kw">pub</span> <span class="ident">vehicle_type</span>: <span class="ident">VehicleType</span>,
    <span class="kw">pub</span> <span class="ident">length</span>: <span class="ident">Distance</span>,
    <span class="kw">pub</span> <span class="ident">max_speed</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Speed</span><span class="op">&gt;</span>,
}

<span class="kw">impl</span> <span class="ident">VehicleSpec</span> {
    <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">make</span>(<span class="self">self</span>, <span class="ident">id</span>: <span class="ident">CarID</span>, <span class="ident">owner</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">PersonID</span><span class="op">&gt;</span>) -&gt; <span class="ident">Vehicle</span> {
        <span class="macro">assert_eq!</span>(<span class="ident">id</span>.<span class="ident">vehicle_type</span>, <span class="self">self</span>.<span class="ident">vehicle_type</span>);
        <span class="ident">Vehicle</span> {
            <span class="ident">id</span>,
            <span class="ident">owner</span>,
            <span class="ident">vehicle_type</span>: <span class="self">self</span>.<span class="ident">vehicle_type</span>,
            <span class="ident">length</span>: <span class="self">self</span>.<span class="ident">length</span>,
            <span class="ident">max_speed</span>: <span class="self">self</span>.<span class="ident">max_speed</span>,
        }
    }
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Copy</span>, <span class="ident">Clone</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">ParkingSpot</span> {
    <span class="doccomment">/// Lane and idx</span>
    <span class="ident">Onstreet</span>(<span class="ident">LaneID</span>, <span class="ident">usize</span>),
    <span class="doccomment">/// Building and idx (pretty meaningless)</span>
    <span class="ident">Offstreet</span>(<span class="ident">BuildingID</span>, <span class="ident">usize</span>),
    <span class="ident">Lot</span>(<span class="ident">ParkingLotID</span>, <span class="ident">usize</span>),
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">Clone</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ParkedCar</span> {
    <span class="kw">pub</span> <span class="ident">vehicle</span>: <span class="ident">Vehicle</span>,
    <span class="kw">pub</span> <span class="ident">spot</span>: <span class="ident">ParkingSpot</span>,
    <span class="kw">pub</span> <span class="ident">parked_since</span>: <span class="ident">Time</span>,
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>)]</span>
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">enum</span> <span class="ident">DrivingGoal</span> {
    <span class="ident">ParkNear</span>(<span class="ident">BuildingID</span>),
    <span class="ident">Border</span>(<span class="ident">IntersectionID</span>, <span class="ident">LaneID</span>),
}

<span class="kw">impl</span> <span class="ident">DrivingGoal</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">goal_pos</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">constraints</span>: <span class="ident">PathConstraints</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) -&gt; <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Position</span><span class="op">&gt;</span> {
        <span class="kw">match</span> <span class="self">self</span> {
            <span class="ident">DrivingGoal::ParkNear</span>(<span class="ident">b</span>) =&gt; <span class="kw">match</span> <span class="ident">constraints</span> {
                <span class="ident">PathConstraints::Car</span> =&gt; {
                    <span class="kw">let</span> <span class="ident">driving_lane</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">find_driving_lane_near_building</span>(<span class="kw-2">*</span><span class="ident">b</span>);
                    <span class="kw">let</span> <span class="ident">sidewalk_pos</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_b</span>(<span class="kw-2">*</span><span class="ident">b</span>).<span class="ident">sidewalk_pos</span>;
                    <span class="kw">if</span> <span class="ident">driving_lane</span>.<span class="ident">road</span> <span class="op">==</span> <span class="ident">sidewalk_pos</span>.<span class="ident">lane</span>().<span class="ident">road</span> {
                        <span class="prelude-val">Some</span>(<span class="ident">sidewalk_pos</span>.<span class="ident">equiv_pos</span>(<span class="ident">driving_lane</span>, <span class="ident">map</span>))
                    } <span class="kw">else</span> {
                        <span class="prelude-val">Some</span>(<span class="ident">Position::start</span>(<span class="ident">driving_lane</span>))
                    }
                }
                <span class="ident">PathConstraints::Bike</span> =&gt; <span class="prelude-val">Some</span>(<span class="ident">map</span>.<span class="ident">get_b</span>(<span class="kw-2">*</span><span class="ident">b</span>).<span class="ident">biking_connection</span>(<span class="ident">map</span>)<span class="question-mark">?</span>.<span class="number">0</span>),
                <span class="ident">PathConstraints::Bus</span> <span class="op">|</span> <span class="ident">PathConstraints::Train</span> <span class="op">|</span> <span class="ident">PathConstraints::Pedestrian</span> =&gt; {
                    <span class="macro">unreachable!</span>()
                }
            },
            <span class="ident">DrivingGoal::Border</span>(<span class="kw">_</span>, <span class="ident">l</span>) =&gt; <span class="prelude-val">Some</span>(<span class="ident">Position::end</span>(<span class="kw-2">*</span><span class="ident">l</span>, <span class="ident">map</span>)),
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">make_router</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">owner</span>: <span class="ident">CarID</span>, <span class="ident">path</span>: <span class="ident">Path</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) -&gt; <span class="ident">Router</span> {
        <span class="kw">match</span> <span class="self">self</span> {
            <span class="ident">DrivingGoal::ParkNear</span>(<span class="ident">b</span>) =&gt; {
                <span class="kw">if</span> <span class="ident">owner</span>.<span class="ident">vehicle_type</span> <span class="op">==</span> <span class="ident">VehicleType::Bike</span> {
                    <span class="ident">Router::bike_then_stop</span>(<span class="ident">owner</span>, <span class="ident">path</span>, <span class="ident">SidewalkSpot::bike_rack</span>(<span class="kw-2">*</span><span class="ident">b</span>, <span class="ident">map</span>).<span class="ident">unwrap</span>())
                } <span class="kw">else</span> {
                    <span class="ident">Router::park_near</span>(<span class="ident">owner</span>, <span class="ident">path</span>, <span class="kw-2">*</span><span class="ident">b</span>)
                }
            }
            <span class="ident">DrivingGoal::Border</span>(<span class="ident">i</span>, <span class="ident">last_lane</span>) =&gt; {
                <span class="ident">Router::end_at_border</span>(<span class="ident">owner</span>, <span class="ident">path</span>, <span class="ident">map</span>.<span class="ident">get_l</span>(<span class="kw-2">*</span><span class="ident">last_lane</span>).<span class="ident">length</span>(), <span class="kw-2">*</span><span class="ident">i</span>)
            }
        }
    }
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>, <span class="ident">Deserialize</span>, <span class="ident">Serialize</span>, <span class="ident">PartialEq</span>)]</span>
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct</span> <span class="ident">SidewalkSpot</span> {
    <span class="kw">pub</span> <span class="ident">connection</span>: <span class="ident">SidewalkPOI</span>,
    <span class="kw">pub</span> <span class="ident">sidewalk_pos</span>: <span class="ident">Position</span>,
}

<span class="doccomment">/// Point of interest, that is</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>)]</span>
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">enum</span> <span class="ident">SidewalkPOI</span> {
    <span class="doccomment">/// Note that for offstreet parking, the path will be the same as the building&#39;s front path.</span>
    <span class="ident">ParkingSpot</span>(<span class="ident">ParkingSpot</span>),
    <span class="doccomment">/// Don&#39;t actually know where this goes yet!</span>
    <span class="ident">DeferredParkingSpot</span>,
    <span class="ident">Building</span>(<span class="ident">BuildingID</span>),
    <span class="ident">TransitStop</span>(<span class="ident">TransitStopID</span>),
    <span class="ident">Border</span>(<span class="ident">IntersectionID</span>),
    <span class="doccomment">/// The bikeable position</span>
    <span class="ident">BikeRack</span>(<span class="ident">Position</span>),
    <span class="ident">SuddenlyAppear</span>,
}

<span class="kw">impl</span> <span class="ident">SidewalkSpot</span> {
    <span class="doccomment">/// Pretty hacky case</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">deferred_parking_spot</span>() -&gt; <span class="ident">SidewalkSpot</span> {
        <span class="ident">SidewalkSpot</span> {
            <span class="ident">connection</span>: <span class="ident">SidewalkPOI::DeferredParkingSpot</span>,
            <span class="ident">sidewalk_pos</span>: <span class="ident">Position::start</span>(<span class="ident">LaneID::dummy</span>()),
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">parking_spot</span>(
        <span class="ident">spot</span>: <span class="ident">ParkingSpot</span>,
        <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>,
        <span class="ident">parking_sim</span>: <span class="kw-2">&amp;</span><span class="ident">ParkingSimState</span>,
    ) -&gt; <span class="ident">SidewalkSpot</span> {
        <span class="ident">SidewalkSpot</span> {
            <span class="ident">connection</span>: <span class="ident">SidewalkPOI::ParkingSpot</span>(<span class="ident">spot</span>),
            <span class="ident">sidewalk_pos</span>: <span class="ident">parking_sim</span>.<span class="ident">spot_to_sidewalk_pos</span>(<span class="ident">spot</span>, <span class="ident">map</span>),
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">building</span>(<span class="ident">b</span>: <span class="ident">BuildingID</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) -&gt; <span class="ident">SidewalkSpot</span> {
        <span class="ident">SidewalkSpot</span> {
            <span class="ident">connection</span>: <span class="ident">SidewalkPOI::Building</span>(<span class="ident">b</span>),
            <span class="ident">sidewalk_pos</span>: <span class="ident">map</span>.<span class="ident">get_b</span>(<span class="ident">b</span>).<span class="ident">sidewalk_pos</span>,
        }
    }

    <span class="comment">// TODO For the case when we have to start/stop biking somewhere else, this won&#39;t match up with</span>
    <span class="comment">// a building though!</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">bike_rack</span>(<span class="ident">b</span>: <span class="ident">BuildingID</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) -&gt; <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">SidewalkSpot</span><span class="op">&gt;</span> {
        <span class="kw">let</span> (<span class="ident">bike_pos</span>, <span class="ident">sidewalk_pos</span>) <span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_b</span>(<span class="ident">b</span>).<span class="ident">biking_connection</span>(<span class="ident">map</span>)<span class="question-mark">?</span>;
        <span class="prelude-val">Some</span>(<span class="ident">SidewalkSpot</span> {
            <span class="ident">connection</span>: <span class="ident">SidewalkPOI::BikeRack</span>(<span class="ident">bike_pos</span>),
            <span class="ident">sidewalk_pos</span>,
        })
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">bus_stop</span>(<span class="ident">stop</span>: <span class="ident">TransitStopID</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) -&gt; <span class="ident">SidewalkSpot</span> {
        <span class="ident">SidewalkSpot</span> {
            <span class="ident">sidewalk_pos</span>: <span class="ident">map</span>.<span class="ident">get_ts</span>(<span class="ident">stop</span>).<span class="ident">sidewalk_pos</span>,
            <span class="ident">connection</span>: <span class="ident">SidewalkPOI::TransitStop</span>(<span class="ident">stop</span>),
        }
    }

    <span class="comment">// Recall sidewalks are bidirectional.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">start_at_border</span>(<span class="ident">i</span>: <span class="ident">IntersectionID</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) -&gt; <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">SidewalkSpot</span><span class="op">&gt;</span> {
        <span class="prelude-val">Some</span>(<span class="ident">SidewalkSpot</span> {
            <span class="ident">sidewalk_pos</span>: <span class="ident">TripEndpoint::start_walking_at_border</span>(<span class="ident">i</span>, <span class="ident">map</span>)<span class="question-mark">?</span>,
            <span class="ident">connection</span>: <span class="ident">SidewalkPOI::Border</span>(<span class="ident">i</span>),
        })
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">end_at_border</span>(<span class="ident">i</span>: <span class="ident">IntersectionID</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) -&gt; <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">SidewalkSpot</span><span class="op">&gt;</span> {
        <span class="prelude-val">Some</span>(<span class="ident">SidewalkSpot</span> {
            <span class="ident">sidewalk_pos</span>: <span class="ident">TripEndpoint::end_walking_at_border</span>(<span class="ident">i</span>, <span class="ident">map</span>)<span class="question-mark">?</span>,
            <span class="ident">connection</span>: <span class="ident">SidewalkPOI::Border</span>(<span class="ident">i</span>),
        })
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">suddenly_appear</span>(<span class="ident">pos</span>: <span class="ident">Position</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) -&gt; <span class="ident">SidewalkSpot</span> {
        <span class="kw">let</span> <span class="ident">lane</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_l</span>(<span class="ident">pos</span>.<span class="ident">lane</span>());
        <span class="macro">assert!</span>(<span class="ident">lane</span>.<span class="ident">is_walkable</span>());
        <span class="macro">assert!</span>(<span class="ident">pos</span>.<span class="ident">dist_along</span>() <span class="op">&lt;</span><span class="op">=</span> <span class="ident">lane</span>.<span class="ident">length</span>());
        <span class="ident">SidewalkSpot</span> {
            <span class="ident">sidewalk_pos</span>: <span class="ident">pos</span>,
            <span class="ident">connection</span>: <span class="ident">SidewalkPOI::SuddenlyAppear</span>,
        }
    }
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">Clone</span>, <span class="ident">Copy</span>)]</span>
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct</span> <span class="ident">TimeInterval</span> {
    <span class="comment">// TODO Private fields</span>
    <span class="kw">pub</span> <span class="ident">start</span>: <span class="ident">Time</span>,
    <span class="kw">pub</span> <span class="ident">end</span>: <span class="ident">Time</span>,
}

<span class="kw">impl</span> <span class="ident">TimeInterval</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">start</span>: <span class="ident">Time</span>, <span class="ident">end</span>: <span class="ident">Time</span>) -&gt; <span class="ident">TimeInterval</span> {
        <span class="kw">if</span> <span class="ident">end</span> <span class="op">&lt;</span> <span class="ident">start</span> {
            <span class="macro">panic!</span>(<span class="string">&quot;Bad TimeInterval {} .. {}&quot;</span>, <span class="ident">start</span>, <span class="ident">end</span>);
        }
        <span class="ident">TimeInterval</span> { <span class="ident">start</span>, <span class="ident">end</span> }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">percent</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">t</span>: <span class="ident">Time</span>) -&gt; <span class="ident">f64</span> {
        <span class="kw">if</span> <span class="self">self</span>.<span class="ident">start</span> <span class="op">==</span> <span class="self">self</span>.<span class="ident">end</span> {
            <span class="kw">return</span> <span class="number">1.0</span>;
        }

        <span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> (<span class="ident">t</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">start</span>) <span class="op">/</span> (<span class="self">self</span>.<span class="ident">end</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">start</span>);
        <span class="macro">assert!</span>((<span class="number">0.0</span>..<span class="op">=</span><span class="number">1.0</span>).<span class="ident">contains</span>(<span class="kw-2">&amp;</span><span class="ident">x</span>));
        <span class="ident">x</span>
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">percent_clamp_end</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">t</span>: <span class="ident">Time</span>) -&gt; <span class="ident">f64</span> {
        <span class="kw">if</span> <span class="ident">t</span> <span class="op">&gt;</span> <span class="self">self</span>.<span class="ident">end</span> {
            <span class="kw">return</span> <span class="number">1.0</span>;
        }
        <span class="self">self</span>.<span class="ident">percent</span>(<span class="ident">t</span>)
    }
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">Clone</span>, <span class="ident">Copy</span>)]</span>
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct</span> <span class="ident">DistanceInterval</span> {
    <span class="comment">// TODO Private fields</span>
    <span class="kw">pub</span> <span class="ident">start</span>: <span class="ident">Distance</span>,
    <span class="kw">pub</span> <span class="ident">end</span>: <span class="ident">Distance</span>,
}

<span class="kw">impl</span> <span class="ident">DistanceInterval</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new_driving</span>(<span class="ident">start</span>: <span class="ident">Distance</span>, <span class="ident">end</span>: <span class="ident">Distance</span>) -&gt; <span class="ident">DistanceInterval</span> {
        <span class="kw">if</span> <span class="ident">end</span> <span class="op">&lt;</span> <span class="ident">start</span> {
            <span class="macro">panic!</span>(<span class="string">&quot;Bad DistanceInterval {} .. {}&quot;</span>, <span class="ident">start</span>, <span class="ident">end</span>);
        }
        <span class="ident">DistanceInterval</span> { <span class="ident">start</span>, <span class="ident">end</span> }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new_walking</span>(<span class="ident">start</span>: <span class="ident">Distance</span>, <span class="ident">end</span>: <span class="ident">Distance</span>) -&gt; <span class="ident">DistanceInterval</span> {
        <span class="comment">// start &gt; end is fine, might be contraflow.</span>
        <span class="ident">DistanceInterval</span> { <span class="ident">start</span>, <span class="ident">end</span> }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">lerp</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">x</span>: <span class="ident">f64</span>) -&gt; <span class="ident">Distance</span> {
        <span class="macro">assert!</span>((<span class="number">0.0</span>..<span class="op">=</span><span class="number">1.0</span>).<span class="ident">contains</span>(<span class="kw-2">&amp;</span><span class="ident">x</span>));
        <span class="self">self</span>.<span class="ident">start</span> <span class="op">+</span> <span class="ident">x</span> <span class="op">*</span> (<span class="self">self</span>.<span class="ident">end</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">start</span>)
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">length</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="ident">Distance</span> {
        (<span class="self">self</span>.<span class="ident">end</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">start</span>).<span class="ident">abs</span>()
    }
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">PartialEq</span>, <span class="ident">Debug</span>, <span class="ident">Clone</span>)]</span>
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct</span> <span class="ident">CreatePedestrian</span> {
    <span class="kw">pub</span> <span class="ident">id</span>: <span class="ident">PedestrianID</span>,
    <span class="kw">pub</span> <span class="ident">start</span>: <span class="ident">SidewalkSpot</span>,
    <span class="kw">pub</span> <span class="ident">speed</span>: <span class="ident">Speed</span>,
    <span class="kw">pub</span> <span class="ident">goal</span>: <span class="ident">SidewalkSpot</span>,
    <span class="kw">pub</span> <span class="ident">path</span>: <span class="ident">Path</span>,
    <span class="kw">pub</span> <span class="ident">trip</span>: <span class="ident">TripID</span>,
    <span class="kw">pub</span> <span class="ident">person</span>: <span class="ident">PersonID</span>,
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">PartialEq</span>, <span class="ident">Clone</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct</span> <span class="ident">CreateCar</span> {
    <span class="kw">pub</span> <span class="ident">vehicle</span>: <span class="ident">Vehicle</span>,
    <span class="kw">pub</span> <span class="ident">router</span>: <span class="ident">Router</span>,
    <span class="kw">pub</span> <span class="ident">maybe_parked_car</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">ParkedCar</span><span class="op">&gt;</span>,
    <span class="doccomment">/// None for buses</span>
    <span class="kw">pub</span> <span class="ident">trip_and_person</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="ident">TripID</span>, <span class="ident">PersonID</span>)<span class="op">&gt;</span>,
    <span class="kw">pub</span> <span class="ident">maybe_route</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">TransitRouteID</span><span class="op">&gt;</span>,
}

<span class="kw">impl</span> <span class="ident">CreateCar</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">for_appearing</span>(
        <span class="ident">vehicle</span>: <span class="ident">Vehicle</span>,
        <span class="ident">router</span>: <span class="ident">Router</span>,
        <span class="ident">trip</span>: <span class="ident">TripID</span>,
        <span class="ident">person</span>: <span class="ident">PersonID</span>,
    ) -&gt; <span class="ident">CreateCar</span> {
        <span class="ident">CreateCar</span> {
            <span class="ident">vehicle</span>,
            <span class="ident">router</span>,
            <span class="ident">maybe_parked_car</span>: <span class="prelude-val">None</span>,
            <span class="ident">trip_and_person</span>: <span class="prelude-val">Some</span>((<span class="ident">trip</span>, <span class="ident">person</span>)),
            <span class="ident">maybe_route</span>: <span class="prelude-val">None</span>,
        }
    }

    <span class="comment">// TODO Maybe inline in trips, the only caller.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">for_parked_car</span>(
        <span class="ident">parked_car</span>: <span class="ident">ParkedCar</span>,
        <span class="ident">router</span>: <span class="ident">Router</span>,
        <span class="ident">trip</span>: <span class="ident">TripID</span>,
        <span class="ident">person</span>: <span class="ident">PersonID</span>,
    ) -&gt; <span class="ident">CreateCar</span> {
        <span class="ident">CreateCar</span> {
            <span class="ident">vehicle</span>: <span class="ident">parked_car</span>.<span class="ident">vehicle</span>.<span class="ident">clone</span>(),
            <span class="ident">router</span>,
            <span class="ident">maybe_parked_car</span>: <span class="prelude-val">Some</span>(<span class="ident">parked_car</span>),
            <span class="ident">trip_and_person</span>: <span class="prelude-val">Some</span>((<span class="ident">trip</span>, <span class="ident">person</span>)),
            <span class="ident">maybe_route</span>: <span class="prelude-val">None</span>,
        }
    }
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">pedestrian_body_radius</span>() -&gt; <span class="ident">Distance</span> {
    <span class="ident">map_model::SIDEWALK_THICKNESS</span> <span class="op">/</span> <span class="number">4.0</span>
}
</code></pre></div>
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