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Re: [sumo-user] Car following model and leaders

I'ts the same function for all models: https://github.com/eclipse/sumo/blob/5d82afd50f994d74904b035e5a380befc61c6c00/src/microsim/cfmodels/MSCFModel.cpp#L72-L84

Am Di., 29. März 2022 um 18:05 Uhr schrieb Hriday Sanghvi via sumo-user <sumo-user@xxxxxxxxxxx>:
Hello again,

Thank you for the quick response. Where do I find the calculation for the breaking distance on SUMO? Is it specific to each car following model? Or as I assumed it is the same calculation for them all?

Sincerely,
Hriday


On Tue, 29 Mar 2022 at 16:54, Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
Correct. You need to add the minGap for the front-bumper-to-back-bumper distance. The 'dist' parameter controls the maximum search distance for locating the leader (for a value of dist=0, it defaults to the breaking distance of the vehicle).

Am Di., 29. März 2022 um 17:49 Uhr schrieb Hriday Sanghvi via sumo-user <sumo-user@xxxxxxxxxxx>:
Hello,

I am currently using the Krauss model for car-following following a very simple 2-lane scenario. When I use the traci.vehicle.getLeader(vehID=vh, dist=0.0) command, for a vehicle f.1, I get the output ('f.0', 1.0995103573504839) - which is telling me that it is ~1.1m in front of the vehicle f.1.

From what I can tell, it is calculating this value from
Front bumper position of vehicle f.0 - Front bumper position of vehicle f.1 - Length of vehicle f.0 - Default mingap (2.5 m) = 13.70 - 5.10 - 5.0 - 2.5 = 1.1m

Is my understanding correct? So if I want the actual distance between the ego vehicle's front bumper and the leader vehicle's back bumper, I need to add the value of "minGap"? Is the "dist" parameter related to this?

Thank you.
Sincerely,
Hriday.

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