Re: [sumo-user] traci deceleration

[Jakob Erdmann <namdre.sumo@xxxxxxxxxxxxxx>]

Hello,

carFollowModels in SUMO may distinguish between a desired maximum deceleration 'decel' and the maximum deceleration in case of emergency 'emergencyDecel'. The latter value is assumed to be at least as high as 'decel' and ultimately restricts braking capability. By default emergencyDecel assumes the same value as decel so you may never notice the distinction.

The fact that emergencyDecel may have a lower value than decel after calling traci.vehicle.setDecel is a bug (https://github.com/DLR-TS/sumo/issues/3755) now fixed.

You can either update to the latest development version or call

vehicle.setEmergencyDecel() explicitly as a workaround.

regards,

Jakob

2018-01-03 13:28 GMT+01:00 Hess, Ramona (TM-P) via sumo-user <sumo-user@xxxxxxxxxxxxxxxxxxxxx>:

Hi, I have a problem with the traci.vehicle command setDecel.
Since I want to control one car in the SUMO-traffic by an external model, I would like to set the maximum acceleration and the maximum deceleration of this car to 999999, so that only the external model has an impact on the car’s possible acceleration and deceleration.
Setting the maximum acceleration to 999999 works perfectly fine. When I try to speed up “my_car” via the external model, it accepts the new speed without any delay. However, the car seems to have a constant deceleration of 4.5 m/s^2 when slowing down, no matter whether I put traci.vehicle.setDecel(‘my_car’,1) or traci.vehicle.setDecel(‘my_car’,999999) or anything else. Am I forgetting something or is there something wrong with the command?
Thanks!
Ramona



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