When using a yellow time of 3 seconds at a road speed of 50km/h, then cars may have to brake for ~3m/s^2 in some situations. Emergency braking occurs for cars that have very low decel values (i.e. ~1.2). Possible mitigations are: a) define emergencyDecel as 4.5 and disable the emergency braking warning (--mergencydecel.warning-threshold 1.1) b) let cars drive at yellow (jmDriveAfterYellowTime 3) c) allow higher decel values d) increase length of yellow phase
regards, Jakob Am Sa., 7. Mai 2022 um 17:35 Uhr schrieb Jaime Moya <[email protected]>: > Hi, > > I'm getting the "Warning: Vehicle 'id_v' performs emergency braking with > decel..." message. All of these messages are related to vehicles braking at > traffic lights. > > Reading the documentation (https://sumo.dlr.de/docs/Simulation/Safety.html) > I found that "...*yellow phases which are too short in relation to the > vehicle speed (giving insufficient time to come to a stop). By default this > causes strong braking (Warning: emergency braking) potentially followed by > rear-end collisions*". However, I defined a 3 seconds yellow > phase, plus a 1 second red-red phase, so I think this is enough time > considering a near 50 km/h edge max. speed. > > What would be the best way to solve this? > > What would happen if I modify the emergencyDecel parameter to 4.5 m/s2? > > I attach the simulation files. > > Thank you in advance > > > > _______________________________________________ > sumo-user mailing list > [email protected] > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user >
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