setScale value is not used in flows

[YDLin9784]

Hi all,

I am trying to use traci.vehicleType.setScale() to manipulate the density of my flow. so I has this piece of code in my .py:

That returns "100.0" as the scale, in the meanwhile in my route file I have this :

but when I run simulations, the flow "hdv" is still having 12 vehicles instead of 1,200 as I expected.
I tried other traci.vehicleType command, seems they are all working except this one.

Any help would be appreciated!

[m-kro]

You have discovered a bug. Getters and setters were implemented in #10161 but the scale value is not checked for updates after the simulation has been initialised. So currently it is not possible but we will fix that.

[YDLin9784]

Hi,

thank you for your information!

Just a follow up question if you don’t mind. Are there other ways to change the flow capacity from the code like the setScale function? I am trying to run multiple simulations with different vehsPerHour of flows.

[m-kro]

It may be a bit cumbersome but you can always replicate flows yourself by adding single vehicles (traci.vehicle.add). But you are probably better off waiting for the bug fix (expected for today).

[m-kro]

@YDLin9784 I added the fix to the repository, Either build SUMO from fresh Github source or wait for development version binaries of tomorrow.

[YDLin9784]

Thank you for the quick response!