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Re: [sumo-user] Vehicle performs emergency braking

The ACC model has a rather narrow range of applicability. In particular, the model is known to produce collisions at the default step-length of 1s. Better results can be achieved by setting a lower step length (i.e. 0.1s).

Am Do., 6. Jan. 2022 um 07:49 Uhr schrieb Pradeep Viyaluru Harinath <pradeep.viyaluruharinath@xxxxxxxx>:

To add here I am using the ACC car following model





From: sumo-user <sumo-user-bounces@xxxxxxxxxxx> On Behalf Of Pradeep Viyaluru Harinath
Sent: Wednesday, January 5, 2022 9:18 PM
To: Sumo project User discussions <sumo-user@xxxxxxxxxxx>
Subject: [sumo-user] Vehicle performs emergency braking




When I run the configuration I get the following error for many vehicles. Can anyone let me know what could be the cause of such warning and how to prevent it? Does the severity level =1 indicates high severity? Is this warning something that needs to be given careful thought since I had one vehicle involving in a collision.


“performs emergency braking with decel=-9.00 wished=4.50 severity=1.00”


I didn’t notice such huge amount of warnings in earlier version.




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