with laneChangeMode=512, the whole laneChangeModel code that would make use of parameters lcCooperative etc. is disabled. In this mode, the vehicles relies on traci commands (changeLane, changeSublane) to perform any lane changes at all.
Am Mi., 16. März 2022 um 13:07 Uhr schrieb Hriday Sanghvi via sumo-user < [email protected]>: > Hello, > > Thank you for your response. A detail that might be important is that I > set my lane changing mode to 512 (for collision avoidance and safety-gap > enforcement only). > > The flow is defined in my routes file as: > >> *<flow id="f" begin="0" number="100" vehsPerHour="10000" type="veh" >> route="r0" departLane="random" departSpeed="random" arrivalLane="random" />* > > > where the route is just a traversal of 1 edge from end to end (1000m) and > the vehicle type is defined as: > >> *<vType id="veh" length="5" color="0,1,0" />* > > > I would have imagined that the random starting speeds and lanes would make > it such that vehicles were forced to cooperate and lane change accordingly? > Do I have to mess with the speed mode too? > > Thank you. > > Sincerely, > Hriday > > > On Wed, 16 Mar 2022 at 09:10, Jakob Erdmann <[email protected]> wrote: > >> The scenario you described is heavily influenced by the departLane and >> departSpeed parameters. >> With default parameters you will only get insertions on the rightmost >> lane with moderate density (~1500 veh/hr) and no cooperative lane changing >> will be needed. >> If you set departLane="free" and departSpeed="avg" you should see high >> flow and lcCooperative will be impactful. >> Another good scenario for observing the effect of lcCooperative are >> on-ramps. here vehicles cannot change lane far in advance and must instead >> rely on cooperative behavior to change left from their (short) acceleration >> lane. >> >> regards, >> Jakob >> >> Am Di., 15. März 2022 um 18:10 Uhr schrieb Hriday Sanghvi via sumo-user < >> [email protected]>: >> >>> Hello again, >>> >>> Thank you for the response. I understand that these 3 parameters are the >>> main factors that affect cooperative changes. >>> >>> In a 2-lane scenario and a 3-lane scenario (road length = 1000m) with >>> the rightmost lane blocked by a stopped vehicle of length 300m at position >>> 750m, there doesn't seem to be a big difference when setting >>> lcCooperative=1.0 vs. lcCooperative=0.0 for 100 vehicles to pass through at >>> a rate of 10000 vehicles/hr -> only a difference of 4-8 simulation time >>> steps (seconds in my case). Wondering in what scenario this difference in >>> parameters would be most visible - if any clue? >>> >>> Thank you. >>> >>> Sincerely, >>> Hriday >>> >>> >>> On Mon, 14 Mar 2022 at 14:08, Jakob Erdmann <[email protected]> >>> wrote: >>> >>>> Hello, >>>> cooperative behavior is actually guided by three parameters that can be >>>> controlled separately: >>>> - lcCooperative: whether to perform a cooperative lane change if >>>> decreases ego speed, See Line 1375 >>>> - lcCooperativeSpeed (defaults to lcCooperative): whether to adapt the >>>> ego speed to help other vehicles with lane changing. This is the code you >>>> already found >>>> - lcCooperativeRoundabout (defaults to lcCooperative): whether to use >>>> the inside lane on a multi-lane roundabout. See Line 1230 >>>> >>>> lcCooperativeSpeed (myCooperativeSpeed) actually controls speed >>>> adaptions for the vehicle that wants to merge as well as the vehicle that >>>> wants to help (there is a known problem with this: >>>> https://github.com/eclipse/sumo/issues/9473) >>>> >>>> The 'getSlowest' code is for preventing overtaking on the right where >>>> this is forbidden. This is unrelated to cooperative behavior. >>>> To understand the speed adaptations that are advised >>>> (myLCAccelerationAdvices), activate the 'DEBUG_INFORM' flag in line 95 and >>>> then select vehicles in the simulation. (debug console output requires the >>>> debug build when on windows). >>>> >>>> regards, >>>> Jakob >>>> >>>> >>>> Am So., 13. März 2022 um 12:14 Uhr schrieb Hriday Sanghvi via sumo-user >>>> <[email protected]>: >>>> >>>>> Hello, >>>>> >>>>> I am trying to understand the cooperative actions taken by vehicles in >>>>> SL2015 LC model. I am going through the C++ code and the start of this >>>>> line: >>>>> https://github.com/eclipse/sumo/blob/main/src/microsim/lcmodels/MSLCM_SL2015.cpp#L366 >>>>> seems to have the crux of the cooperative actions taken. >>>>> >>>>> >>>>> https://github.com/eclipse/sumo/blob/21d11b1a26c4b781929b64416084e02a5f974cbe/src/microsim/lcmodels/MSLCM_SL2015.cpp#L370 >>>>> seems to be the selection of speed for the vehicle that is cooperating to >>>>> let another vehicle onto its lane? OR is the selection of speed for the >>>>> vehicle that is changing lane into another one? - Not sure how >>>>> *wanted* (variable) is calculated. >>>>> >>>>> >>>>> https://github.com/eclipse/sumo/blob/21d11b1a26c4b781929b64416084e02a5f974cbe/src/microsim/lcmodels/MSLCM_SL2015.cpp#L2703 >>>>> tells me that the speed above is also in some way related to checking the >>>>> speed of the slowest leaders on the neighbouring lanes? >>>>> >>>>> Please advise on where I could read more to understand in-depth - both >>>>> the lane changing and the speed change that is required by the cooperative >>>>> action? (For example, if I set the lcCooperative parameter to 1.0 (max)) >>>>> >>>>> Thank you. >>>>> >>>>> Sincerely, >>>>> Hriday >>>>> _______________________________________________ >>>>> 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 >
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