Hi Mirko, I am using my own control algorithm for this purpose. Currently i am just specifying a number that coincides with the length of the road but it does reach the intended density when i introduce the ego vehicle. Is there a way to force the ego vehicle to enter the simulation only once the density is reached through the route file?
Thank you. On Thu, 26 Oct 2023, 16:30 Mirko Barthauer, <[email protected]> wrote: > Hi Camillo, > > > > can you please say which car-following model you use? We had some issues > (see here <https://github.com/eclipse-sumo/sumo/pull/13755>) with ACC > recently which could impact your task. > > > > Best regards > > Mirko > > > > > > > > > > -----Original-Nachricht----- > > Betreff: Re: [sumo-user] How to set fixed time gaps between vehicles? > > Datum: 2023-10-26T14:57:50+0200 > > Von: "Camillo S" <[email protected]> > > An: "Mirko Barthauer" <[email protected]> > > > > > > > Hi Mirko, > > thanks for these tips. I am actually still not able to solve this problem. > Firstly I am using a custom model and i only have one lane. I tried your > approach but i think because i am using a custom model it does not consider > this tau value in the calculation. My requirement is to ensure there are > 80veh/km in a 5km straight road stretch and i would like to have the scene > achieved the moment the ego vehicle is introduced in the scenario so that > it can experience this density. Can this be done without Traci? > > Thank you. > > Best regards, > Camillo > > On Tue, 17 Oct 2023 at 10:06, Mirko Barthauer <[email protected]> > wrote: > >> Hi Camillo, >> >> >> >> tau is a car-following model parameter which defines the time gap between >> the vehicles and can be defined in the vehicle type definition inside the >> route file (see docs >> <https://sumo.dlr.de/docs/Definition_of_Vehicles%2C_Vehicle_Types%2C_and_Routes.html#car-following_model_parameters>). >> So basically you define a vehicle type like this: >> >> >> >> *<vType id="myType" tau="1" />* >> >> >> >> At tau = 1s the distance to the leading vehicle when driving at 7.885m/s >> is 7.885m (no rocket math here ;-)). Obviously I have left out all the >> other possible vehicle type attributes you can find in the documentation. >> The vehicle type can be referenced by its ID in the flow using the type >> attribute. >> >> >> >> Best regards >> >> Mirko >> >> >> >> >> >> >> >> >> >> -----Original-Nachricht----- >> >> Betreff: Re: [sumo-user] How to set fixed time gaps between vehicles? >> >> Datum: 2023-10-16T21:18:07+0200 >> >> Von: "Camillo S" <[email protected]> >> >> An: "Mirko Barthauer" <[email protected]> >> >> >> >> >> >> >> Hi Mirko, >> Thank you for the link. I tried the solution and understood the way to >> define the constant density but I am not sure I understood how to define >> the fixed time gap/spacing between the vehicles..I can't really understand >> what the sentence below means and how to change the tau value. Thanks. >> >> - at a default value of tau=1 (desired time headway excluding minGap) >> this means vehicles will be in a stationary state at 7.885m/s >> >> >> On Mon, 16 Oct 2023 at 18:01, Mirko Barthauer <[email protected]> >> wrote: >> >>> Hi Camillo, >>> >>> >>> >>> please read carefully the FAQ entry >>> <https://sumo.dlr.de/docs/FAQ.html#how_do_i_insert_vehicles_with_a_fixed_density> >>> about constant density and get back if you have more questions. >>> >>> >>> >>> Best regards >>> >>> Mirko >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> -----Original-Nachricht----- >>> >>> Betreff: [sumo-user] How to set fixed time gaps between vehicles? >>> >>> Datum: 2023-10-16T17:36:59+0200 >>> >>> Von: "Camillo S via sumo-user" <[email protected]> >>> >>> An: "[email protected]" <[email protected]> >>> >>> >>> >>> >>> >>> >>> Hi all, >>> >>> I would like to fix the movement of the vehicles with a fixed time gap >>> between them so that they will move in a platoon like manner. I tried to >>> find the solution in the documentation to adjust the flow information but I >>> am not able to understand how to do this correctly. I would like to have a >>> density of 80 vehicles/km with a time gap of 2 seconds between the >>> vehicles. Can this be defined in the route file itself? Thank you. >>> >>> Best, >>> Camillo >>> >>> >>> >> >> > > >
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