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[sumo-user] Why are vehicles stopping at a junction

Hi,
We are using sumo for a project and have run into some issue we can't explain. After running our simulation project for some time it goes into grid lock. And we have been able to trace (visually) the grid lock to the fact that some vehicle always stop at an intersection and do not move again even though there are not blockages or traffic jams ahead of it. This always happens at a particular intersection and at a particular time.

Wondering if someone has encountered such a problem before and what might be the likely cause and potential solutions? Also, is there a way to get sumo to generate an output on vehicles with information on why a vehicle can't proceed? Because visually it does seem that there is no reason why the vehicle should stop.

Thanks

Franklin E. Gbologah, Ph.D.
Research Engineer II
School of Civil & Environmental Engineering
Georgia Institute of Technology, Atlanta, GA.
https://www.linkedin.com/in/fgbologah3


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