Please check the updated description at
https://sumo.dlr.de/docs/Car-Following-Models.html#model_parameters and let
me know if it is sufficient to answer your question.

Am Mo., 7. Feb. 2022 um 16:53 Uhr schrieb Pradeep Viyaluru Harinath <
[email protected]>:

> Hello Jakob,
>
> Thanks for your reply. I have looked at the documentation and it was a bit
> misleading on whether tau is used as a parameter to specify reaction time
> or time headway.  Say I have a composition with vehicle 1 brake reaction
> Time 0.7sec , time headway 1.5 sec, vehicle 2 brake reaction time 0.4sec ,
> time headway 2 sec. How can I provide in sumo?
>
> Regards,
> V.H.Pradeep
>
> ------------------------------
> *From:* sumo-user <[email protected]> on behalf of Jakob
> Erdmann <[email protected]>
> *Sent:* Monday, February 7, 2022 3:42:59 AM
> *To:* Sumo project User discussions <[email protected]>
> *Subject:* [EXTERNAL] Re: [sumo-user] reaction time and desired time gap
>
> *  **EXTERNAL EMAIL***
>   This email originated outside of The University of Texas at San Antonio.
>   Please exercise caution when clicking on links or opening attachments.
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>
> tau="2" is a valid parameter. For details on tau and reaction time, see
> https://sumo.dlr.de/docs/Car-Following-Models.html#model_parameters
> <https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsumo.dlr.de%2Fdocs%2FCar-Following-Models.html%23model_parameters&data=04%7C01%7Cpradeep.viyaluruharinath%40utsa.edu%7Cca498b6824324261cddd08d9ea1e43ff%7C3a228dfbc64744cb88357b20617fc906%7C0%7C1%7C637798237989428129%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=Qx%2FOrPiDCLbUxMNikuTXVRwKCDoQa2vkheNBHB8TN%2F0%3D&reserved=0>
>
> Am Mo., 7. Feb. 2022 um 08:38 Uhr schrieb Pradeep Viyaluru Harinath <
> [email protected]>:
>
> Hello ,
>
>
>
> I would like to know how to specify reaction time of vehicles and also the
> desired time headway. I believe the parameter “tau” is specified to give
> desired headways in SUMO but I wonder it has a range of 0 to 1, if I want
> to say I want to give 2 sec headway how do I that
>
>
>
> Regards,
>
> V.H.Pradeep
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