Re: [sumo-user] CACC gap time

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

timeGapOnLane is based on the front-bumper-to-back-bumper distance whereas the tau value applies to the distance front+minGap-to-back-bumper.

One simple way to achieve the desird heaways is to set minGap=0.

However, due to the bug https://github.com/eclipse/sumo/issues/9831 you should either set step-length = 0.1 or upgrade to the latest development version.

regards,

Jakob

Am Sa., 18. Dez. 2021 um 17:53 Uhr schrieb T Eenachtacht <t188012021@xxxxxxxxx>:

How should the CACC car following model be configured to realize platoons with a gap time of 0.3 sec in stable conditions? In NETEDIT the CACC algorithm is set with tau = 0.3 and minGap = 1.0. 

However, during simulation the 'time gap on lane' never drops below 0.8 sec, and occasionally exceeds 4.0 sec with vehicle speeds between 30 and 70 km/h, and simulation step-length of 0.01 sec. 

I also tried with larger tau values, with similar effects that the realized gap time is more than double the tau value. What is the caveat?

Thanks, Bart

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