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Re: [sumo-user] Issue with vehicles entering simultaneously on intersection

the situation in the roundabout is similar to the weaving situation at a very short motorway on-off-ramp. The solution outlined at can be applied to the roundabout as well.
Please note, that there may still be deadlocks due to a bug in  the latest few sumo version.
If you still see these deadlocks after adding extra connections, please update to the latest development version (


Am Do., 27. Jan. 2022 um 14:35 Uhr schrieb Alejandro Rodríguez Sánchez <alrodr25@xxxxxx>:
Hello everyone,

I have been noticing that when two vehicles enter in an intersection at the same time, they remain stacked no matter who has right of way.
For example, in the image below, vehicle 1 has right of way. However, it won't move and neither the vehicle 2 will move.
This happens also in TLS-controlled intersections. I have tried modifying several parameters as the impatience and impatience time but the vehicles remain stacked once they enter the intersection.
Is this an avoidable situation?

Kind regards,
Alejandro Rodríguez Sánchez
PhD student
CIEMAT // Universidad Complutense de Madrid
28040 Madrid
email: alrodr25@xxxxxx

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