1) In the latest development version there is traci.vehicle.getFollower (
https://sumo.dlr.de/docs/Downloads.php#sumo_-_latest_development_version)
2) the parameters and their defaults are listed at
https://sumo.dlr.de/docs/Definition_of_Vehicles,_Vehicle_Types,_and_Routes.html#car-following_model_parameters.
You can extract trajectories using fcd-output:
https://sumo.dlr.de/docs/Simulation/Output/FCDOutput.html

regards,
Jakob

Am Fr., 7. Aug. 2020 um 06:18 Uhr schrieb Saeed Vasebi <[email protected]
>:

> Hi everyone!
> I have two questions and I would be glad if you answer them.
> 1) Is there any function to return the follower vehicle's information? For
> example, getLeader
> <https://sumo.dlr.de/pydoc/traci._vehicle.html#VehicleDomain-getLeader> 
> returns
> the lead vehicle's ID and gap. I need a function to return the follower
> vehicle's speed and gap (distance between the follower and subject vehicle).
> 2) How can I calibrate IDM car-following parameters for SUMO? Is there
> default IDM parameters for SUMO? If not, how can I extract trajectories
> from SUMO to calibrate IDM for a typical traffic scenario?
>
> --
> Best regards
>
> *Saeed *
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