> Do we have a similar function in libsumo like processLinkApproaches() that can give me vSafe? No.
Am Mi., 22. Feb. 2023 um 22:03 Uhr schrieb Mahima <mahim...@gmail.com>: > Yes, I have checked sigma is 0. > > Do we have a similar function in libsumo like processLinkApproaches() that > can give me vSafe? > > Just found out that to calculate speed for the next step, sumo calculates > using processLinkApproaches() and NOT as follows. > double vthis=LastTimestepSpeed+ACCEL2SPEED(LastTimestepAcceleration); > > Thanks for your help. > > On Wed, Feb 22, 2023 at 4:41 PM Jakob Erdmann <namdre.s...@gmail.com> > wrote: > >> Have you checked the actual value of sigma being used by the vehicles in >> the type parameter dialog of sumo-gui? >> >> Am Mi., 22. Feb. 2023 um 14:38 Uhr schrieb Mahima <mahim...@gmail.com>: >> >>> But I am keeping sigma = 0. >>> >>> For sigma 0, vMax should be used as next speed and not vDawdle. >>> vDawdle = MAX2(vMin, dawdle2(vMax, sigma, veh->getRNG())); >>> >>> On Wed, Feb 22, 2023 at 4:32 PM Jakob Erdmann <namdre.s...@gmail.com> >>> wrote: >>> >>>> > This randomness calculation should be off when we use --random false. >>>> No. This is not what option --random does. >>>> Please see https://sumo.dlr.de/docs/Simulation/Randomness.html >>>> As long as vehicles have sigma > 0 (default is 0.5) there will be >>>> random speed fluctuations between your partitions. >>>> >>>> Am Mi., 22. Feb. 2023 um 14:23 Uhr schrieb Mahima <mahim...@gmail.com>: >>>> >>>>> Hi, >>>>> >>>>> We have developed a parallel framework over SUMO. When I am copying >>>>> vehicles from one partition to another. With the vehicles I am also >>>>> copying >>>>> the following lane change parameters. I am keeping sigma 0, --random false >>>>> and same seed value for all the partitions and sequential SUMO. >>>>> >>>>> "laneChangeModel.speedGainProbabilityRight" >>>>> "laneChangeModel.keepRightProbability" >>>>> "laneChangeModel.lookAheadSpeed" >>>>> >>>>> After adding vehicles in the next partition, I am also moving them for >>>>> the desired position in the current step and setting speed for the current >>>>> step. >>>>> i am calculating the current step speed as follows: >>>>> >>>>> double vthis=LastTimestepSpeed+ACCEL2SPEED(LastTimestepAcceleration); >>>>> Or if the vehicle has a Leader...then with the follow speed. >>>>> >>>>> But if I compare travel time of this parallel framework with >>>>> sequential SUMO, I am getting an accuracy error. >>>>> >>>>> I have found that patchSpeedBeforeLC is calculating some different >>>>> speed which is causing randomness. >>>>> >>>>> vDawdle = MAX2(vMin, dawdle2(vMax, sigma, veh->getRNG())); >>>>> >>>>> This randomness calculation should be off when we use --random false. >>>>> >>>>> Thanks, >>>>> Mahima >>>>> >>>>> On Wed, Feb 22, 2023 at 1:41 PM Jakob Erdmann <namdre.s...@gmail.com> >>>>> wrote: >>>>> >>>>>> The function getStopSpeed is not only used for <stop> elements but >>>>>> also for approaching intersections where a vehicle needs to come to a >>>>>> stop. >>>>>> From your description it is not clear what exactly you are doing and >>>>>> why you are observing a differences between some speeds and some other >>>>>> speeds. >>>>>> >>>>>> >>>>>> Am Di., 21. Feb. 2023 um 14:24 Uhr schrieb Mahima <mahim...@gmail.com >>>>>> >: >>>>>> >>>>>>> Thanks for your reply. >>>>>>> Yes, sigma is already set as 0. The only difference I can see is the >>>>>>> stop speed (getStopSpeed) is different. >>>>>>> >>>>>>> How can I set the stop speed of a vehicle? Is it by using >>>>>>> libsumo::Vehicle::setStopParameter? But then I need to define the stop >>>>>>> first...correct? >>>>>>> >>>>>>> Thanks. >>>>>>> >>>>>>> On Sun, Feb 19, 2023 at 3:28 PM Jakob Erdmann <namdre.s...@gmail.com> >>>>>>> wrote: >>>>>>> >>>>>>>> > Why does the vehicle need information about the vehicle on the >>>>>>>> previous edge for the car following model speed calculation? >>>>>>>> This is likely a misunderstanding. What gives you that impression? >>>>>>>> >>>>>>>> > How can I set the car following model parameters from the >>>>>>>> previous partition to the master partition such that it gives the same >>>>>>>> speed calculation of a vehicle? >>>>>>>> The default car-following model doesn't have internal state so it >>>>>>>> should reproduce the same behavior when faced with the same situation >>>>>>>> (distance, ego speed, leader speed, deceleration capabilities, >>>>>>>> speedFactor). A possible cause for difference is the random component >>>>>>>> (sigma). You can check whether the differences are due to randomness by >>>>>>>> setting sigma=0. >>>>>>>> >>>>>>>> Am So., 19. Feb. 2023 um 11:36 Uhr schrieb Mahima < >>>>>>>> mahim...@gmail.com>: >>>>>>>> >>>>>>>>> Hi, >>>>>>>>> >>>>>>>>> Why does the vehicle need information about the vehicle on the >>>>>>>>> previous edge for the car following model speed calculation? >>>>>>>>> How can I set the car following model parameters from the previous >>>>>>>>> partition to the master partition such that it gives the same speed >>>>>>>>> calculation of a vehicle? >>>>>>>>> >>>>>>>>> Thanks >>>>>>>>> >>>>>>>>> On Wed, Sep 28, 2022 at 9:48 AM Jakob Erdmann < >>>>>>>>> namdre.s...@gmail.com> wrote: >>>>>>>>> >>>>>>>>>> using getParameter / setParameter with the following values >>>>>>>>>> should be enough for the default lanechangem model: >>>>>>>>>> "laneChangeModel.speedGainProbabilityRight" >>>>>>>>>> "laneChangeModel.keepRightProbability" >>>>>>>>>> "laneChangeModel.lookAheadSpeed" >>>>>>>>>> >>>>>>>>>> Am Mo., 26. Sept. 2022 um 09:58 Uhr schrieb Mahima < >>>>>>>>>> mahim...@gmail.com>: >>>>>>>>>> >>>>>>>>>>> When I am copying a vehicle from one partition to the other on >>>>>>>>>>> the same lane and position as it was on the previous partition, but >>>>>>>>>>> in the >>>>>>>>>>> current timestep if there was a lane change decision in the previous >>>>>>>>>>> partition......which lane change API or flag will give me the same >>>>>>>>>>> lane >>>>>>>>>>> change decision in the master partition. >>>>>>>>>>> In this scenario, I am already making sure that the neighbouring >>>>>>>>>>> vehicles for this vehicle are the same as on the previous partition. >>>>>>>>>>> >>>>>>>>>>> Please suggest. >>>>>>>>>>> >>>>>>>>>>> On Mon, Sep 26, 2022 at 9:39 AM Jakob Erdmann < >>>>>>>>>>> namdre.s...@gmail.com> wrote: >>>>>>>>>>> >>>>>>>>>>>> No. TraCI runs before the computation of this step's values ( >>>>>>>>>>>> https://sumo.dlr.de/docs/Developer/Implementation_Notes/Simulation_Loop.html#main_vehicle_update_loop >>>>>>>>>>>> ) >>>>>>>>>>>> >>>>>>>>>>>> Am So., 25. Sept. 2022 um 11:02 Uhr schrieb Mahima < >>>>>>>>>>>> mahim...@gmail.com>: >>>>>>>>>>>> >>>>>>>>>>>>> Hi, >>>>>>>>>>>>> >>>>>>>>>>>>> Is there any way to read the vehicle's speed, lane and >>>>>>>>>>>>> position in the current timestep? >>>>>>>>>>>>> >>>>>>>>>>>>> libsumo::Vehicle::getLanePosition >>>>>>>>>>>>> libsumo::Vehicle::getSpeed >>>>>>>>>>>>> All these APIs, give information about the last timestep. >>>>>>>>>>>>> >>>>>>>>>>>>> Thanks >>>>>>>>>>>>> _______________________________________________ >>>>>>>>>>>>> sumo-user mailing list >>>>>>>>>>>>> sumo-user@eclipse.org >>>>>>>>>>>>> To unsubscribe from this list, visit >>>>>>>>>>>>> https://www.eclipse.org/mailman/listinfo/sumo-user >>>>>>>>>>>>> >>>>>>>>>>>> _______________________________________________ >>>>>>>>>>>> sumo-user mailing list >>>>>>>>>>>> sumo-user@eclipse.org >>>>>>>>>>>> To unsubscribe from this list, visit >>>>>>>>>>>> https://www.eclipse.org/mailman/listinfo/sumo-user >>>>>>>>>>>> >>>>>>>>>>> _______________________________________________ >>>>>>>>>>> sumo-user mailing list >>>>>>>>>>> sumo-user@eclipse.org >>>>>>>>>>> To unsubscribe from this list, visit >>>>>>>>>>> https://www.eclipse.org/mailman/listinfo/sumo-user >>>>>>>>>>> >>>>>>>>>> _______________________________________________ >>>>>>>>>> sumo-user mailing list >>>>>>>>>> sumo-user@eclipse.org >>>>>>>>>> To unsubscribe from this list, visit >>>>>>>>>> https://www.eclipse.org/mailman/listinfo/sumo-user >>>>>>>>>> >>>>>>>>> _______________________________________________ >>>>>>>>> sumo-user mailing list >>>>>>>>> sumo-user@eclipse.org >>>>>>>>> To unsubscribe from this list, visit >>>>>>>>> https://www.eclipse.org/mailman/listinfo/sumo-user >>>>>>>>> >>>>>>>> _______________________________________________ >>>>>>>> sumo-user mailing list >>>>>>>> sumo-user@eclipse.org >>>>>>>> To unsubscribe from this list, visit >>>>>>>> https://www.eclipse.org/mailman/listinfo/sumo-user >>>>>>>> >>>>>>> _______________________________________________ >>>>>>> sumo-user mailing list >>>>>>> sumo-user@eclipse.org >>>>>>> To unsubscribe from this list, visit >>>>>>> https://www.eclipse.org/mailman/listinfo/sumo-user >>>>>>> >>>>>> _______________________________________________ >>>>>> sumo-user mailing list >>>>>> sumo-user@eclipse.org >>>>>> To unsubscribe from this list, visit >>>>>> https://www.eclipse.org/mailman/listinfo/sumo-user >>>>>> >>>>> _______________________________________________ >>>>> sumo-user mailing list >>>>> sumo-user@eclipse.org >>>>> To unsubscribe from this list, visit >>>>> https://www.eclipse.org/mailman/listinfo/sumo-user >>>>> >>>> _______________________________________________ >>>> sumo-user mailing list >>>> sumo-user@eclipse.org >>>> To unsubscribe from this list, visit >>>> https://www.eclipse.org/mailman/listinfo/sumo-user >>>> >>> _______________________________________________ >>> sumo-user mailing list >>> sumo-user@eclipse.org >>> To unsubscribe from this list, visit >>> https://www.eclipse.org/mailman/listinfo/sumo-user >>> >> _______________________________________________ >> sumo-user mailing list >> sumo-user@eclipse.org >> To unsubscribe from this list, visit >> https://www.eclipse.org/mailman/listinfo/sumo-user >> > _______________________________________________ > sumo-user mailing list > sumo-user@eclipse.org > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user >
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