Hello,
you can call traci.vehicle.add repeatedly with the same routeID. just make
sure to use a new vehicleID every time.
Alternatively, you could call sumo with option --scale to easily scale the
amount of traffic up or down.

regards,
Jakob

Am Mo., 18. Nov. 2019 um 22:19 Uhr schrieb Hao Zhou <[email protected]>:

> Hi all,
>
> I want to keep generating vehicles until the network reaches a certain
> density level. I know sumo has the option to give a limit on the number of
> vehicles, which is one of the options. But do there exist better
> approaches?
> I want to do multiple experiments with different density levels, so it
> would be best if I can do it in a loop with traCI.
> I tried traci.vehicle.add, and found an old question says that route id
> cannot be repeated.
> In a word, how can I use traci to generate flow until we reach our desired
> density?
>
> Thank you in advance,
> Hao
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