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Re: [sumo-user] [EXTERNAL] Re: Collisions

The intended design of the simulation is to never create a collision on insertion unless this is forced via TraCI. Thus, your observation indicates a bug that should be fixed.
If you could send me a minimal version of xml input files (i.e. as a zip archive) that reproduce the faulty behavior, this would aid in fixing the problem.
Collisions during the 'move' stage might also be due to "dangerous" model parameters or limitations of the CACC model. I'd have too look at the simulation myself to determine whether it's a bug or a feature (hence input files would be helpful).

Am Mo., 24. Jan. 2022 um 09:14 Uhr schrieb Pradeep Viyaluru Harinath <pradeep.viyaluruharinath@xxxxxxxx>:

Appears to be my understanding is wrong, the documentation (VehicleInsertion - SUMO Documentation (dlr.de)) states the sloppy insert is preferred all the time. Not sure on the error received.

 

Regards,

V.H.Pradeep

 

From: sumo-user <sumo-user-bounces@xxxxxxxxxxx> On Behalf Of Pradeep Viyaluru Harinath
Sent: Monday, January 24, 2022 2:00 AM
To: Sumo project User discussions <sumo-user@xxxxxxxxxxx>
Subject: Re: [sumo-user] [EXTERNAL] Re: Collisions

 

I suppose the flow is so huge that the segment reaches the capacity even if we could insert the vehicle this is potentially causing the collision to take place. Let me know if my understanding is incorrect here.

 

I have another instance where the collision occurs because of the ‘stage=move’ as attached, what could be the potential reason for that

 

Regards,

V.H.Pradeep

 

From: sumo-user <sumo-user-bounces@xxxxxxxxxxx> On Behalf Of Pradeep Viyaluru Harinath
Sent: Monday, January 24, 2022 1:53 AM
To: Sumo project User discussions <sumo-user@xxxxxxxxxxx>
Subject: Re: [sumo-user] [EXTERNAL] Re: Collisions

 

This is the route file for a base scenario similar to what is being observed I have been modifying the available default attributes , to model the flow. When the flow supplied is small it performs well with the exceptions that I receive warnings however when the flow is increased say doubled collisions begin to take place due to unavailability of headways I suppose.

 

Regards,

Pradeep V.H

 

From: sumo-user <sumo-user-bounces@xxxxxxxxxxx> On Behalf Of Jakob Erdmann
Sent: Monday, January 24, 2022 1:45 AM
To: Sumo project User discussions <sumo-user@xxxxxxxxxxx>
Subject: Re: [sumo-user] [EXTERNAL] Re: Collisions

 

Please provide a minimal version of your scenario that reproduces these collisions (I'm particularly interested in  'stage=insertion').

 

Am Mo., 24. Jan. 2022 um 08:41 Uhr schrieb Pradeep Viyaluru Harinath <pradeep.viyaluruharinath@xxxxxxxx>:

I have configuration file based on XMLs , all I do with Traci is to create a loop so that it starts the sumo on command prompt and keeps running without closing.

 

Regards,

V.H.Pradeep

 

From: sumo-user <sumo-user-bounces@xxxxxxxxxxx> On Behalf Of Jakob Erdmann
Sent: Monday, January 24, 2022 1:38 AM
To: Sumo project User discussions <sumo-user@xxxxxxxxxxx>
Subject: [EXTERNAL] Re: [sumo-user] Collisions

 

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Are you using traci to insert / move the vehicles or can you create these collisions with XML inputs alone?

 

Am Mo., 24. Jan. 2022 um 08:22 Uhr schrieb Pradeep Viyaluru Harinath <pradeep.viyaluruharinath@xxxxxxxx>:

Hello all,

I am using a CACC model and I reduced the step size to 0.1 as advised earlier. Initially the number of teleports were low but when I started increasing the flow the vehicles started colliding eventually (as in attached) ending up teleported is there some way I can avoid this?

 

Regards,

Pradeep V.H

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