Hi Chedly, please send me the input files for the simulation. regards, Jakob
Am Sa., 7. März 2020 um 00:11 Uhr schrieb Chedly Bourguiba < [email protected]>: > Hi Jakob, > > Thank you for your quick response. > > We are currently defining the flows for one single time period, for one > single intersection. We have specified the number of vehicles entering an > approach (259). The approach has 5 lanes (2 for right turns, 2 for thru > movements and 1 for the left turn). We have also defined the turning > probabilities for left, thru and right. > > When we run the simulation, however, the output numbers are significantly > higher for the thru movement lanes than expected (based on the number of > total vehicles at the approach multiplied by the probability for the thru > movement). In addition, the right turn movements and the left turn > movements are close to what they should be. Consequently, the total number > of vehicles at that approach is higher than the number we expect from the > flow file. We're struggling to understand how this behaviour could be > possible. We've checked that the flow number in the flow file and the > turning probabilities in the turns file are correct. > > Do you know any possible reasons why this should be happening? Let me know > if you need any further information to diagnose. > > Thanks, > Chedly > > On Thu, Mar 5, 2020 at 10:52 PM Jakob Erdmann <[email protected]> > wrote: > >> Hello, >> >> The traffic demand given to SUMO typically does not specify the exact >> lane sequence. This means individual lanes could see higher flows and other >> lanes could see lower flow due to lane choice. >> I would expect the simulated edge flow to be no higher than the defined >> flow. >> An exception might happen if vehicles cannot be inserted for some time >> and then are released into the simulation at a later time, thereby >> increasing the flow beyond the specified value. >> Things to check for: >> - edge flow vs expected flow at different time aggregations >> - depart delay (trip info), delayed departures per lane (gui coloring >> style) >> - departLane definition for your flows >> >> regards, >> Jakob >> >> Am Fr., 6. März 2020 um 01:52 Uhr schrieb Chedly Bourguiba < >> [email protected]>: >> >>> Hi, >>> >>> I have an intersection where I know the exact vehicle count per lane and >>> movement per hour (a specific hour). When running sumo, I define the flow >>> XML file using the vehicle per hour attribute and then I compare the count >>> I had for the specific hour that I modeled and some lanes would have a >>> count higher than the value I used to model the flow. >>> Do you have any leads/idea where the discrepancy can come from? >>> Thank you in advance for your help! >>> >>> Best, >>> >>> Chedly >>> >>> _______________________________________________ >>> sumo-user mailing list >>> [email protected] >>> To change your delivery options, retrieve your password, or unsubscribe >>> from this list, visit >>> https://www.eclipse.org/mailman/listinfo/sumo-user >>> >> _______________________________________________ >> sumo-user mailing list >> [email protected] >> To change your delivery options, retrieve your password, or 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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