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61 lines
2.0 KiB
Markdown
61 lines
2.0 KiB
Markdown
# Modeling assumptions
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This is pretty disorganized right now, just need to start something.
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## Sidewalk connectivity
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Should it be possible to close sidewalks for construction? Right now, this
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breaks too many assumptions that're hard to recompute. Building front paths and
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bus stops are associated with a sidewalk, so that makes applying the edit way
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more unclear. Closing intersections is still useful -- remove all of the vehicle
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turns, but allow the walking turns.
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## Graph connectivity
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For now, no map edits should be able to impact any of the trips possible in the
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baseline -- so no impacting graph connectivity, no killing bus stops, etc.
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## Over-taking
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Unsupported right now, but it should happen. Unlocks shared bike/ped trails like
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the Burke.
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## Left turns in the middle of a road
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Into a driveway, or using the shared left turn lanes. This should be supported.
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Parking and unparking already have the ability to block one queue -- extend
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that.
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## Demand modeling
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When the player makes it much more/less convenient to take some trip, people
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will eventually shift mode or take different trips altogether. Not attempting
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any of that yet -- just using PSRC trips. I don't understand the demand modeling
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process well at all yet.
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## Bike/bus lane connectivity
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Bikes and buses can make crazy left turns from the rightmost protected lane.
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Alternatively, stop generating those turns and start generating turns between
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protected and general lanes.
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## Parking
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No restrictions -- all available spots are treated equally. No cost, time
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limits, or private spots.
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## U-turns
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Only happen at dead-ends right now. But there are a few important ones to
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support -- like Montlake Blvd to go WB on 520.
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## Roads without sidewalks
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Last-leg routing... pedestrians need to walk on the road. How to model this?
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Happens in Seattle when there's parking without sidewalks nearby.
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## One-at-a-time roads
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Some roads are "two-way", but have parking on both sides, and so are effectively
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one way at a time. How's this tagged in OSM? How do we model this?
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