Re: [sumo-user] Use of minGap and Tau

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

I see your point. However, If the vehicles are required to maintain a given minimum gap while standing and also limit their deceleration to some fixed (desired) value then they need to consider that minGap already while driving so the minGap is achievable after the braking maneuver.

However, the above mostly pertains to the default Krauss model. Other models such as IDM are more lax in maintaining minGap and thus their headways will also be different.

Am Mi., 12. Aug. 2020 um 16:54 Uhr schrieb Bae, Jong In <jbae42@xxxxxxxxxx>:

Hello,

According to the SUMO documentation on vehicle definitions, both minGap (default = 2.2m) and Tau (default = 1s) are used to determine a vehicle's headway.

Is there a reason why both properties should be used while driving to characterize a realistic driving behavior? 

To my understanding, using both minGap and Tau would make the headway larger than the realistic value since they both contribute to determining the headway.

Should tau only be used while vehicles are moving whereas minGap should be only used while vehicles are standing?

If so, should they be muted (or be assigned with a value close to 0) for the vehicle status that is not applicable for them?

Thanks,

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