Hi Jakob, Thanks for your reply. How can I address it if I want to have access to the distance from the start of the first jam to the end of the last jam? I have noticed the speed threshold for lane area detectors, which has something to do with halting vehicles. Is it also related with jam? How dose SUMO determine whether a vehicle is in jam? Possibly I can set a high threshold so that vehicles in low speed between jams can be recognized to be in jam as well.
Best, Yu Jakob Erdmann <[email protected]> 于2022年11月15日周二 08:52写道： > if the detector is long enough It can have more than one distinct jam at > the same time. Thus the sum of jam lengths will be different from the > maximum. > > Am Di., 8. Nov. 2022 um 01:22 Uhr schrieb yu tang <[email protected] > >: > >> Hi all, >> >> I am using lane area detectors to measure queue length at on-ramps that >> are regulated by ramp meters. I set both the simulation step size and the >> period of lane area detectors equal to one second. It is not surprising to >> find that "meanMaxJamLengthInMeters" and "maxJamLengthInMeters" have the >> same values, but it is confusing to find that "jamLengthInMetersInSum" can >> have different values. In my opinion, it should have the same values >> since the simulation step size is equal to the period of lane area >> detectors. >> >> Besides, I also tried to access the queue length via Traci. The method >> getJamLengthMeters() of lane area detectors provides the values that the >> same as "jamLengthInMetersInSum" does. >> >> Can anyone explain the differences between "jamLengthInMetersInSum" and >> "maxJamLengthInMeters" when both the simulation step size and the period of >> lane area detectors are equal to one second? >> >> Best, >> Yu >> _______________________________________________ >> 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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