Costum edge speed (impedance)

Hi guys.

I’m experimenting with classic traffic assignment problem with a o-d-matrix. Ideally, this would be done by increasing the time needed on a road segment if capacity is reached (using a CR-function), so that in the next iteration, drivers would pick a faster route if there is any. In ORS, this maybe could be achieved by tweaking with the max-speed parameter or create a costum edge-speed on a segment.

Is there a way to create impedance/change edge attributes on the ors-graph-network during runtime? The graph-folder is mounted as a volume, so technically it should be possible in my understanding. But I wasn’t able to edit or open any files in it.