Thank you, dear Jakob. 1.now if I use freq equal to traffic light cycle the problem will be solved? 2.you said "the flow data points you are using are for individual edges. If you need a whole-network diagram you need to sum up the edges flows and compute an average density." for flow I should only aggregate flows in the intervals and should I compute average ? 3. you said " in your scenario, the flow is mostly affected by the traffic lights rather than the vehicle density. Thus it will look different from a motorway diagram". is this normal in intersections?
On Thu, Jun 11, 2020 at 4:55 PM Jakob Erdmann <[email protected]> wrote: > 1) in your scenario, the flow is mostly affected by the traffic lights > rather than the vehicle density. Thus it will look different from a > motorway diagram > 2) the flow data points you are using are for individual edges. If you > need a whole-network diagram you need to sum up the edges flows and compute > an average density. Also, the flow is averaged over 300s (more than one > traffic light cycle). This means you are not seeing peak flow on green but > the average flow including stopped-on-red > 3) I recommend that you use 'entered + departed' for you flow computation. > Also, there are probably edges that have low vehicle counts but downstream > congestion prevents vehicles from advancing and thus gives zero flow. > > regards, > Jakob > > Am Do., 11. Juni 2020 um 12:20 Uhr schrieb Amirhosein Karbasi < > [email protected]>: > >> Hello, >> >> I want to draw a flow density diagram. My network includes 64 >> intersections. I ran a simulation (1800s) and use an additional file for >> Edge-based output (freq is 300). I drew a flow density diagram in excel >> based on the Edge-based output file and I calculated flow according to “ >> *entered* * 3600 / *freq*”. Now I have 3 problems: >> >> 1. I think my flow density diagram is not similar to regular flow >> density diagrams. (there are a png in attach file)(Simulation time = 1800s). >> >> 2. When I drew a plot my max flow is about 852 (for 1800s, 2400s, and >> full-time simulation max flow is approximately 1000) and I think max flow >> should be bigger than 20000 for a network like this. >> >> 3. I have too many zero flows. >> >> I saw various topics about this on the Sumo website but my problems are >> not solved yet. >> >> I sent my whole files too. please say me what I am doing wrong? >> >> Thank you so much. >> _______________________________________________ >> sumo-user mailing list >> [email protected] >> To unsubscribe from this list, visit >> https://www.eclipse.org/mailman/listinfo/sumo-user >> > _______________________________________________ > sumo-user mailing list > [email protected] > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user >
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