| Re: [sumo-user] [Sumo] Questions about driving behavior at roundabouts |
Hi Anna-Lena,
roundabouts are modeled as a sequence of priority intersections. Vehicles entering the roundabout have to yield and thus slow down (even if there is no other vehicle close by). Further on, vehicles respect the lane/edge/vehicle class-based speed limits. You can lower the speed limit on the exit lane of the roundabout if you want the vehicles to slow down there. Maybe insert a short edge if you want it to happen at a specific position.
Concerning overtaking: You can raise the probability to overtake with the lane change model parameter lcOpposite. The maximum lookahead is currently limited to 150m (see docs). If you still think the vehicle in your scenario should overtake but doesn't, you can share the scenario for further checks.
Best regards
Mirko
-----Original-Nachricht-----
Betreff: [sumo-user] [Sumo] Questions about driving behavior at roundabouts
Datum: 2023-10-13T10:29:39+0200
Von: "Schlamp, Anna-Lena via sumo-user" <sumo-user@xxxxxxxxxxx>
An: "sumo-user@xxxxxxxxxxx" <sumo-user@xxxxxxxxxxx>
Hi,
as part of my research, I am investigating roundabouts in detail. For this purpose I have modeled a real roundabout in Sumo and added some traffic.
In free flow conditions, a vehicle approaches the roundabout with maximum allowed speed (in this setting 50 km/h) and slows down to about 14 km/h to enter the roundabout. For exit, however, there is no braking. The vehicle exits with the maximum set speed of about 30 km/h for the edge within the roundabout.
In my opinion, a real driver would not slow down to such a low speed for entry, but would also slow down before exit.
Therefore the question: Which driving model is defined for driving into, in and out of the roundabout? How could I change the driving behavior in principle?
In scenarios with oncoming traffic, I also observed that vehicles do not enter a gap of suitable size. What is defined here and how can I change this?
I would be very grateful for any feedback.
Best regards,
AS