This should happen naturally since the vehicles have a distribution of
desired speeds in their default configuration.
You can increase the spread of the distribution by setting 'speedDev="0.2"
in your vType definition.
See
https://sumo.dlr.de/docs/Definition_of_Vehicles%2C_Vehicle_Types%2C_and_Routes.html#speed_distributions

You can use laneChangeModel parameter lcSpeedGain to reduce or increase the
motivation for this type of (tactical) lane changing:
https://sumo.dlr.de/docs/Definition_of_Vehicles%2C_Vehicle_Types%2C_and_Routes.html#lane-changing_models


Am Mi., 15. Dez. 2021 um 09:56 Uhr schrieb ali mirzaei <[email protected]
>:

> Is there any way to keep some vehicles driving into the lanes departed
> from while the others change lanes now and then?
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