Hi Ahmad, am major part of the jumpy behavior seems to be caused by the vType parameter lcSpeedGainRight= "10" The default for this is 0.1 and a value of 1 would make overtaking for speed gain to the right as likely as overtaking on the left (which may have been your intention with setting lcOvertakeRight="1").
Nevertheless, I still observed a few back-and-forth changes by the same vehicle in a short time span and this may yet lead to more findings. regards, Jakob Am Di., 22. Feb. 2022 um 16:17 Uhr schrieb Ahmad Abdallah via sumo-user < [email protected]>: > Hi Jakob, > > I changed the car following model from "W99" to "Krauss", but the problem > seems to persist, as shown in the attached video. > > I am also attaching the input files needed to replicate this behavior. > > Best regards, > Ahmad Abdallah. > > > On Mon, Feb 21, 2022 at 9:00 AM Ahmad Abdallah <[email protected]> wrote: > >> Thanks a lot for your response, Jakob. I'll change the caFollowModel and >> observe the behavior and get back to you later today. >> >> For now, I'm attaching the input files. I'm also attaching a snippet >> which shows where I'm observing the "jumpy" behavior. Please note that I >> only defined traffic in the NB direction and that you need to wait for >> congestion to start building up (after second 3000) to observe this >> behavior in the specified location. >> >> Thanks! >> Best regards, >> Ahmad Abdallah. >> >> >> On Mon, Feb 21, 2022 at 7:33 AM Jakob Erdmann <[email protected]> >> wrote: >> >>> Please check whether the problems persists when changing >>> carFollowModel="W99" to "Krauss". >>> Either way, the video suggests that there is a bug somewhere and I'd ask >>> you to provide input files for reproducing the jumpy behavior. >>> >>> Am Fr., 18. Feb. 2022 um 16:43 Uhr schrieb Ahmad Abdallah via sumo-user < >>> [email protected]>: >>> >>>> Thanks for your response, Jakob. >>>> >>>> The problem with reducing lcAssertive to smaller values as it seems to >>>> me is that in some cases merging vehicles coming from on-ramps won't find a >>>> long enough gap to merge before the end of the acceleration lane, and this >>>> creates a repetitive stopping and bottleneck instances downstream of >>>> merging segments. I noticed that even if I set high values for lcStrategic >>>> this problem keeps happening. I thought this is probably linked to the min >>>> gap parameters, but I'm using the default *tau*(which I believe is low >>>> enough) and here are my parameters for the car following and lane >>>> changing models. Do you see any other sources of trouble? >>>> >>>> [image: image.png] >>>> >>>> One other problem that I'm facing is lateral instability. I am not sure >>>> if this is the correct term, but basically in some occasions vehicles tend >>>> to perform a series of lane changes within a few seconds time frame, >>>> especially upstream of the location of the major bottleneck location >>>> (interchange) in the freeway I'm simulating . It looks as if these >>>> vehicles(drivers) are hesitant and cannot decide which lane to drive in. I >>>> think in most cases the cause of those abrupt lane changes is the >>>> LcSpeedGain parameter. However, this parameter has proved vital in getting >>>> vehicles to shift to lanes with less traffic density when being in a more >>>> congested lane. I'm attaching a short recording which displays this >>>> problem. Any thoughts? >>>> >>>> >>>> Best regards, >>>> Ahmad Abdallah. >>>> >>>> >>>> On Thu, Feb 17, 2022 at 11:33 AM Jakob Erdmann <[email protected]> >>>> wrote: >>>> >>>>> lcAssertive 30 is quite likely to cause this. It reduces the >>>>> acceptable gap size by a factor of 30 and thus causes lane-changing into >>>>> short gaps that are very unsafe. >>>>> I'd recommend keeping lcAssertive well below 2 (though even a value of >>>>> 1.1 may cause collision in exceptional circumstances). >>>>> >>>>> Am Do., 17. Feb. 2022 um 16:09 Uhr schrieb Ahmad Abdallah via >>>>> sumo-user <[email protected]>: >>>>> >>>>>> Hello, >>>>>> >>>>>> >>>>>> >>>>>> While running a simulation in SUMO, I am facing a problem which is >>>>>> that vehicles are colliding and running over each other when changing >>>>>> lanes, as shown in the attached picture. Do you have any idea how I can >>>>>> solve this problem? Could it be due to high LcAssertive value? I am >>>>>> currently using 30. >>>>>> >>>>>> >>>>>> >>>>>> To give more context, I just disabled the teleporting when colliding >>>>>> option. So now I only get warnings when vehicles collide and no >>>>>> teleporting >>>>>> is done except in instances of gridlocks. >>>>>> >>>>>> >>>>>> [image: Sumo_Snippet.jpg] >>>>>> >>>>>> Best regards, >>>>>> Ahmad Abdallah. >>>>>> _______________________________________________ >>>>>> 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 >>>>> >>>> _______________________________________________ >>>> 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 >>> >> _______________________________________________ > 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
