[sumo-user] car following model

[Pradeep Viyaluru Harinath]

Hello all,

I have been trying to use the default values of ACC and CACC but I would not 
see it in the netedit and I am not sure if specifying in route file gives any 
sense to it. I want to edit parameters such as "gapControlGainSpeed, 
collisionAvoidanceGainSpace" etc. Please let me know how to modify the values 
of these parameters

Thanks and regards,
V.H.Pradeep

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[sumo-user] Lane change model parameters

[Pradeep Viyaluru Harinath]

Hello all,

I am trying to change the default values of  lane changing model parameters 
such as lcassertive, lcspeedgain etc. After I made changes in the net edit and 
rum the simulation in SUMO GUI I am unsure if the changes are reflected in the 
simulation run. I want to retrieve these values in each time step for every 
vehicle. I want to know how it can be retrieved either using Traci or command 
prompt.

Thanks and regards,
V.H.Pradeep
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[sumo-user] [*** SPAM ***]detemining queue length in SUMO

[Menno van der Woude]

Hello,

currently I am trying to use this option:

https://sumo.dlr.de/docs/Simulation/Output/QueueOutput.html

to determine queue lengths at a signalized intersection.

This generates an enormous XML file for my simulation (timestep 0.1sec,
duration 12 hours). I wrote a small Python script to extract moments
from this data where the queue is shrinking after reaching a temporary
maximum. Though not ideal, this works well enough.

A few questions/remarks about this:

  * I see queues being logged that expand beyond the end of alane; is
this correct? This is great, I was just curious how this works: does
SUMO look at where vehicles want to go?
  * Given this situation:

How will SUMO determine where the queue is standing? Ie. if it is a
queue going right or going straight in this image.
  * For my current pupose it would be completely OK for this logging to
only happen for example every second. It would spare a lot of
logging and save some space.
  * It may be worth considering adding an option to only log temporary
maximum queue lengths, ie. the size right before the queue shrinks
with a given minimum threshold. Of course it depends on the use
case, but it is often interesting to know when queues occured and
how long they were.

Greets, Menno

ps. In case someone is intrerested, I am happy to share my tiny
queue-log-parsing-script


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