[sumo-user] Importing intersections from OpenStreetMap

[Linwood Hudson <vtkougrr@xxxxxxxxx>]

Hello!

My project makes extensive use of OpenStreetMap as a source for SUMO networks. For the most part it is working great, but the one area I'm struggling with is when 2 divided roads meet at a stoplight-controlled intersection. This results in way too many stoplights at the intersection, which causes vehicles to get stuck and back-up.

I've attached 2 images that reflect my issue. One is a common intersection from OpenStreetMap, where it's author has put a stop-light at each place where a lane crosses another. Although it may look like 4 different roads converging, it's really just 2 roads with a median in the middle. I've looked across various locations in the US and this is a common way for map authors to indicate this.

The other image is the resulting SUMO representation, where there are clearly too many stoplights being represented. Where I would expect there to be just 4 stop lights there are at least 12, maybe more. Similar issues occur when a divided road meets a non-divided road, it still creates extra stoplights (just not as many as the previous case). The only case I've seen that works perfectly is when 2 non-divided roads meet at a stoplight. 

I've tried tweaking several of the netimport settings as described in the SUMO docs (e.g.   --junctions.join, --junctions.join-dist, --tls.join, --tls.join-dist) and that helps some of the smaller intersections, but it doesn't fix many. Is there anything else I can try?

I can go into netedit and remove the unnecessary lights and junctions, but this issue occurs frequently across my maps. Any time I can save by not manually editing my maps would be great.

Thanks for any help!

Linwood 

Attachment: OpenStreetMap.png
Description: PNG image

Attachment: SUMO.png
Description: PNG image