| Re: [sumo-user] Why are vehicles stopping at a junction |
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Barry and Jacob:
Thanks for the response. I think I have solved the problem now. It wasn't exactly the issue Barry described but while following his steps I eventually found the problem and fixed it.
First, I followed Jacob's guidelines below and checked the "foes" of each vehicle stopped at the junction. My junction had four approaches but I realized that only vehicles at the top of the queue from three approaches had "foes" while the vehicle on the fourth
approach did not have any "foe".
Then while following Barry's steps I realized that all the edges on the three approaches with vehicles that had "foes" had the same priority number and the fourth approach where the vehicle had no "foe" had a different priority number.
So I figured out that all the three stopped vehicle may be by random chance arrived at the same time and were locked because they all had the right of way based on the priority number of their edges. I opened my network in NetEdit and changed the junction node
type from "priority" to "allway_stop" and this fixed the problem and the gridlock was resolved.
We had imported the street network over a fairly large city and only checked the junctions with traffic lights (assuming sumo logic can handle all the uncontrolled and stop-controlled junctions). So now I am going to manually check and code each junction.
Thank you once again for the help. Really appreciate it.
Franklin
E. Gbologah, Ph.D.
Research Engineer II School of Civil & Environmental Engineering Georgia Institute of Technology, Atlanta, GA. https://www.linkedin.com/in/fgbologah3 From: sumo-user-bounces@xxxxxxxxxxx <sumo-user-bounces@xxxxxxxxxxx> on behalf of Evans, Barry <B.Evans@xxxxxxxxxxxx>
Sent: Wednesday, May 15, 2019 11:27 To: Sumo project User discussions Subject: Re: [sumo-user] Why are vehicles stopping at a junction I’m not sure if this will help but I had a similar situation with vehicles turning from a junction on a major road onto a service road into a parking area. My fix (though not sure if an efficient fix as I’m quite new to SUMO) was to run the simulation until the vehicle gets stuck at the junction. Then I stop/pause the simulation and then did the following:
0. Make a backup of your network file
1. right clicked on the vehicle that is stuck and selected “Show Current Route”
2. visually check the highlighted route to see which edge is next in the vehicle’s route and take note of where it is
3. right click again on vehicle and select “Hide Current Route”
4. right click on edge you noted in point 2 and select “Copy edge name to clipboard”
5. Open the network file that you’re using in your sumo simulation in a text editor and look for the Edge name identified in point 4.
6. Check the “allow” or “disallow” properties to see if this is preventing the vehicle moving onto that edge. In my instance the edge had the following attribute:
allow=” delivery bicycle pedestrian"
which I think meant everything else was disallowed on that edge.
7. If you have a similar cause as in point 6 the solution I used was to replace:
allow=” delivery bicycle pedestrian"
with
disallow="tram rail_urban rail rail_electric ship"
for that edge.
8. Finally save the updated network file, reload the simulation in sumo and re-run
This seemed to allow the vehicle to continue onto the next edge. I then just repeated the process on rest of problematic edges in that vehicles route and it cleared the problem. You may be able to do points 5 – 7 in netedit software.
I hope this helps if the issue is similar.
Kind regards
Barry
From: sumo-user-bounces@xxxxxxxxxxx <sumo-user-bounces@xxxxxxxxxxx>
On Behalf Of Jakob Erdmann
Yes.
Am Mi., 15. Mai 2019 um 02:00 Uhr schrieb Gbologah, Franklin E <franklin.gbologah@xxxxxxxxxxxxx>:
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