Re: [sumo-user] action-step-length issue

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

(1): This is only a problem in your old SUMO version (presumably 1.15.0). Please upgrade to the latest release.

(2): This was a bug: https://github.com/eclipse-sumo/sumo/issues/16899

regards,

Jakob

Am Di., 15. Juli 2025 um 15:01 Uhr schrieb Ni Ying-Chuan via sumo-user <sumo-user@xxxxxxxxxxx>:

Dear SUMO team,

 

I’d like to share two problems I encounter when setting action-step-length.

 

In my simulation configuration, step-length = 0.25 s.

 

(1) After setting default.action-step-length to 0.5 s, vehicles do not start moving after the light turns green. Please see the simulation package attached. I cannot find the reason. Could there be any problem between traffic lights and action-step-length? Does this mean that setting action-step-length larger than step-length does not work when having traffic lights?

(2) If I set actionStepLength as an attribute in vType instead of in the configuration, duarouter gave me a warning stating that “The parameter action-step-length must be a non-negative multiple of the simulation step-length. Parsing given value (0.50 s.) to the adjusted value 1.00 s.”, which I completely understand, but I don’t see a way to change the step-length already in the stage of demand generation.

 

Thanks in advance for answering me.

 

Best,

Ying-Chuan

 

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