Re: [sumo-user] all vehicles start driving synchronously

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

When the car-following model is active, each vehicle only knows about the leader position from the previous step.

When setting the speed via traci with speedMode = 30  (disregard safe speed) then these constraints are not relevant.

However, the traci script needs to check the state of the traffic light and force all vehicles to drive when the light changes.

Am Mi., 30. Jan. 2019 um 15:18 Uhr schrieb <ratzenmeier@xxxxxx>:

okey thanks. but you're saying, thats possible with TraCI and not possible without? Don't I have the the same simulation step problem, that every vehicle can only start driving one simulation step after the leader vehicle has started?

If not, how can I ignore the car following constraints (only setting the speedMode to 4/8? I think 0 is avoiding everything, even red light).

Greetings!

 

Gesendet: Mittwoch, 30. Januar 2019 um 14:00 Uhr
Von: "Jakob Erdmann" <namdre.sumo@xxxxxxxxx>
An: "Sumo project User discussions" <sumo-user@xxxxxxxxxxx>
Betreff: Re: [sumo-user] all vehicles start driving synchronously

This is easy to do via TraCI by simpling setting the desired speed for all vehicles and making them ignore car-following constraints.

It's neigh impossible to do without TraCI due to architectural constraints (every vehicle can only start driving one simulation step after the leader vehicle has started). You could set --step-length 0.001 to reduce the delay.

 

regards,

Jakob

 

Am Mi., 30. Jan. 2019 um 13:54 Uhr schrieb <ratzenmeier@xxxxxx>:

Hi all,

quick question for my situation:

 

I have a traffic light on red with 10 vehicles waiting. Is there a possibility that the vehicles start driving synchronously when the traffic light turns green?
Every vehicle starts driving at the same moment, like if they were connected.

Thanks! 

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