Simpla relies on consistent lane index across edges for lane change commands

[sushmareddy569]

I'm using Simpla as reference to create a platoon. In my case, I have three edges, when the platoon is moving from one edge to another edge, at the junction the vehicles are shifting to other lanes in the next edge. How do i stop the vehicles from lane changing and make them travel in the same lane from first edge to the last edge?

[m-kro]

Once a platoon of multiple vehicles has formed, the followers will change lanes if the leader does. So the question is rather how to restrict vehicles to certain lanes in general:

• allow certain vehicle classes only on the wanted lanes or
• add waypoints to the route (see docs)

[sushmareddy569]

In my case, even if the leader does not change the lane, the follower is switching into other lanes after entering into second edge through a junction.

Here I'm uploading my file which has network files, route files, cfg files.
Hello.zip

Could you please go through them and suggest how to restrict the vehicles from switching lanes when they pass from one edge to other edge?

[m-kro]

Was working with SUMO v.1.9.0. Followers change lanes starting with v.1.10.0.

[m-kro]

Problem was hidden before this commit. When the edge downstream has more lanes and the leader naturally switches from laneIndex 0 to 1 by driving straight, followers may change to lane 1 on the upstream edge and break the platoon.

[namdre]

Suggestion: if there is a direct connection from the follower lane to the leader lane, then the follower should stay on their lane (the check is a bit more involved if there are intermediate edges between leader and follower)

[m-kro]

Can't reproduce the problem with the current SUMO dev version anymore, because it was solved through merge of #9252 . I'll take the suggestions to create more advanced lane change to a new ticket.