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[sumo-user] Difference between traci and sumolib
  • From: "Ramseier Thomas" <thomas.ramseier@xxxxxxxxxxxxxxxx>
  • Date: Fri, 10 Jul 2026 14:20:25 +0000
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  • Thread-topic: Difference between traci and sumolib

Dear SUMO team,

 

I am working on a relatively large project (thus it is difficult to provide a minimal example) that involves numerous traci calls. To speedup the computation I switched from traci to libsumo. To do so, I simply use the command “libsumo as traci” as suggested on the SUMO website. After numerous tests, I noticed that the outputs using either traci or libsumo are different as I receive different collisions and teleportations warnings when using  either of the two packages. So, my question is: Are there some known functions that differ between traci and libsumo ? It seems especially that libsumo is not doing certain commands as I have more collisions using it compared to traci, but it runs without any error nevertheless... I suspect therefore that some silent errors are happening using libsumo. In particular libsumo.vehicle.changeLane seems to behave differently than it’s traci variant.

 

 

P.S.: I am using sumo version 1.26.0

 

Thanks in advance for your reply.

 

Thomas

 

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