Re: [sumo-user] car following model problem

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

Hello,

if you measure higher flows in real life it might be because the traffic lights in reality are coordinated so they are forming a green wave. In SUMO you can use the offset parameter of the traffic lights to achieve similar coordination (for static traffic light programs that have the same cycle length).

regards,

Jakob

Am Di., 12. Feb. 2019 um 08:20 Uhr schrieb panpingping (A) <panpingping1@xxxxxxxxxx>:

Hi all,

 

I simulated two single intersection respectively and now for each intersection, I put flow volume from the dead edges, and counted the past volume at stop bar near the traffic light every 15 minutes, and make sure that the counted volume is similar with the real field data.

And then I connected the two intersections into one whole network, and still put the same flow volume, and found that the middle edge connecting two intersections has more vehicles(movement is from west to east), which makes the past volume for the eastbound edges for two intersections is less than the realistic data. I guess it is the car following model problem, when it is one intersection only, no vehicles will stop in the outgoing edge, because no trafficlight. But when it comes to two intersections, there are more cars stopped in the outgoing edge because of the red light, which leads to car following model changes, then no so many vehicles can pass the stopbar. I dont know how to deal with this problem. Would you help me.

 

Thanks

Pingping     

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