[sumo-user] CACC gap time

[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