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emergency braking after ignoring junction blocker #11324

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namdre opened this issue Aug 11, 2022 · 1 comment

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a:sumo bug c:junction p:minor

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namdre commented Aug 11, 2022

similar to #11184 but for Krauss/IDM (as noted in #11242)

the code branch for negative gaps causes a discontinuity in behavior

https://github.com/eclipse/sumo/blob/23be5b3f255ef7812f8273bc092a966f27ea351f/src/microsim/MSVehicle.cpp#L2906

namdre added a:sumo c:junction bug labels

namdre self-assigned this

namdre added a commit that referenced this issue


          added test refs #11324, #21

c05e1ff

namdre added the p:minor label

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namdre commented Aug 15, 2022

The linked code is fine. What instead happens is this:

veh1.3 is blocked while still partially on the junction
veh1.4 enters the junction and also becomes blocked more 20+ seconds
0 enters the junction and ignores veh1.4 due to the threshold
veh1.3 and then veh1.4 startsto move again
veh1.4 retains right of way over 0 due to being on the junction first
0 suddenly "notices" veh1.4 and brakes hard

A possible solution might be to adapt right-of-way rules once a vehicle was stuck on the junction for the threshold duration.

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