Hello, The main differences of lower step length are: 1. smoother trajectories 2. increased running time (since more steps must be computed) 3. different insertion pattern since insertion only happens only at step end
Traffic lights near congestion can be quite chaotic though. The first thing to check is whether the difference in behaviors holds up if you repeat the simulation with different seeds. You can easily test this with sumo/tools/runSeeds.py -a sumo -k case1.sumocfg,case2.sumocfg --seeds 0:100 --statistic-output stats.xml then run sumo/tools/output/attributeStats.py case1.sumocfg_0/*.stats.xml sumo/tools/output/attributeStats.py case2.sumocfg_0/*.stats.xml Am Mo., 13. März 2023 um 22:45 Uhr schrieb George Li <[email protected] >: > Hi Community, > > I am writing this email to ask about how would the step-length value in > the sumocfg file would influence the simulation result. I tried two values > as below: > > Case 1: > <time> > <step-length value="0.1"/> > </time> > > Case 2: > <time> > <step-length value="1"/> > </time> > > All other settings are the same. I run simulations using a fixed-time > traffic signal controller at an isolated intersection. However, the results > under the two cases are significantly different: the average total travel > loss of vehicles for case 1 is around 40s but for case 2 is around 80s. > From GUI, congestion can be observed under Case 2 but not for Case 1. May I > ask you about possible reasons for that? Thank you. > > Have a nice day. > > Best, > Wangzhi > > _______________________________________________ > sumo-user mailing list > [email protected] > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user >
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