Re: [sumo-user] Many collisions with CACC model compared to ACC model?

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

Hello,

1) the CACC is known to cause collisions. For this reason I'm not a big fan of that model and I'm inclined to refer you to the original authors of the model for any issues it's causing.

2) I've your provide all the input files for reproducing a collision scenario (network, vehicles etc), I'll take a look and maybe I'll find more issues than I already know of. Send them privately if needs be.

3) how are you measuring collisions? The configuration you sent is configured to completely ignore them.

regards,

Jakob

Am Mo., 27. Jan. 2020 um 14:14 Uhr schrieb Bart Ons <bart.ons@xxxxxxxxxxx>:

Hi,

 

Please, find below a description of a problem that find each time I run simulations.

It is related to the CACC car following model.  

 

 

Problem description:

In SUMO simulations, I have a case where a car is stand still on a motorway with the purpose to provoke collisions.

Peculiarly, A huge number of collisions emerges for the CACC model, while I have no collisions for the ACC model within the exact same conditions.

 

I have a minimal number of parameters for the CACC or ACC model. I’m not using traci to initiate a TOR

There is also no difference whether the parameter “has.toc.device” is set to True or False for different simulations.

Do anyone knows why there is a huge difference?

 

Here, you find the number of collisions when using the CACC model for CAVs and CVs

	mixes proportion
number of v/h	CAV	CV	Number of collisions (50 minutes)
1800	0%	15%	55
1800	25%	15%	246
1800	50%	15%	565

 

 

Here, you find the number of collisions when using the ACC model for CAVs and CVs, keeping everything the same except for the driver model

	mixes proportion
number of v/h	CAV	CV	Number of collisions (50 minutes)
1800	0%	15%	0
1800	25%	15%	0
1800	50%	15%	0

 

 

 

More info:

OS: Linux ubuntu 4.15.0-74-generic #83~16.04.1-Ubuntu SMP Wed Dec 18 04:56:23 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

SUMO: Eclipse SUMO Version 1.2.0  Build features: Linux-4.4.0-146-generic x86_64 GNU 5.4.0 None Proj GUI GDAL GL2

 

In attachment are some input files

Thanks a lot for considering my problem.

 

Kind regards

Bart Ons

Transport & Mobility Leuven

TEL +32 16 95.71.55

 

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