[sumo-user] Collisions during simulation

[Pietro N. <pi...@ti...>]

Dear Jacob,

I downloaded the last svn version of sumo and the wrong collisions have now
disappeared, but some 

collisions (4) still happen. I checked and this time it’s because two
vehicles actually crash. So probably 

there still is a little bug lying around.

I’m using the same map I gave you, converted to the new format. Did you
experience those collisions

during your tests?

Regards,

 

Pietro

 

Da: Jakob Erdmann [mailto:nam...@go...] 
Inviato: giovedì 10 novembre 2011 14:56
A: Pietro Niccoli
Cc: sum...@li...
Oggetto: Re: [sumo-user] R: arrivalPos option

 

Dear Pietro,
thanks for your example.
I traced the invalid "collision" down and it should be fixed now. 
This may well have been a major source of generated "collision" warnings. 

I also noticed that your network was using the old format. You can easily
convert it with the following call:
netconvert -s old.net.xml -o new.net.xml
Not only does get rid of deprecation warnings it also reduces network size
by ~30%.

regards,
Jakob

2011/11/9 Pietro Niccoli <pi...@ti...>

Sure Jakob, here you go. 

This is a map of Torino, Italy. I know it’s a little bit messed up, but it
has been tweaked and modified for a long time.

I used the last version of sumo gui. If you need anything else, just send me
an email.

Best regards, 

Pietro

Da: Jakob Erdmann [mailto:nam...@go...] 
Inviato: mercoledì 9 novembre 2011 13:08
A: Pietro Niccoli
Cc: sum...@li...
Oggetto: Re: [sumo-user] R: arrivalPos option

Hello Pietro,
I'm having a hard time reproducing this behaviour. Could you please send an
example network and route (preferebly small).
regards,
Jakob

2011/11/9 Pietro Niccoli <pi...@ti...>

Hello,
I updated to version 0.13 and I rewrote the parameter, and now it works.
But I found a little bug (supposedly). I run a simulation with a map of
mine, and if a vehicle has a short road as a destination (arrivalPos is set
to -0.1), when it exits sumo reports a wrong teleport and collision:

Warning: Teleporting vehicle '1188'; collision, lane='-543232277_0',
time=291.00.

In this case, the road -543232277 is 6 meters long, the car was travelling
at 7,88 m/s and at step 291 it was positioned at 1,08 m. in the destination
road. In the following step, the car arrives and disappears, but sumo prints
the above error message. There were absolutely no other cars around.
My understanding is that since the car was travelling faster than the
remaining length, this is recognized as a wrong collision. Does it make any
sense?
Thanks for your help!

Pietro