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Restructure the trip mode choice in one of the activity models to more clearly branch based on trip distance, for #227

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This commit is contained in:
Dustin Carlino 2020-09-04 11:15:17 -07:00
parent 4367c03a7d
commit 193a3b1515
1 changed files with 16 additions and 10 deletions
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26
sim/src/make/activity_model.rs
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@ -223,25 +223,20 @@ fn border_person(
fn select_trip_mode(distance: Distance, rng: &mut XorShiftRng) -> TripMode {
// TODO Make this probabilistic
// for example probability of walking currently has massive differences
// at thresholds, it would be nicer to change this graduall
// at thresholds, it would be nicer to change this gradually
// TODO - do not select based on distance but select one that is fastest/best in the
// given situation excellent bus connection / plenty of parking /
// cycleways / suitable rail connection all strongly influence
// selected mode of transport, distance is not the sole influence
// in some cities there may case where driving is only possible method
// to get somewhere, even at a short distance
// Always walk for really short trips
if distance < Distance::miles(0.5) {
return TripMode::Walk;
}
if rng.gen_bool(0.005) {
// low chance for really, really dedicated cyclists
return TripMode::Bike;
}
if rng.gen_bool(0.3) {
// try transit if available, will
// degrade into walk if not available
return TripMode::Transit;
}
// Sometimes bike or walk for moderate trips
if distance < Distance::miles(3.0) {
if rng.gen_bool(0.15) {
return TripMode::Bike;
@ -250,6 +245,17 @@ fn select_trip_mode(distance: Distance, rng: &mut XorShiftRng) -> TripMode {
return TripMode::Walk;
}
}
// For longer trips, maybe bike for dedicated cyclists
if rng.gen_bool(0.005) {
return TripMode::Bike;
}
// Try transit if available, or fallback to walking
if rng.gen_bool(0.3) {
return TripMode::Transit;
}
// Most of the time, just drive
TripMode::Drive
}