Unclear what to add in the Traffic Assets field

[louisvanAmerongen3]

The scripts was able to read the fzp file. Unfortunately I did not succeed to link objects to the Vehicles in the fzp file. I think it has to do with the traffic asset input field.
I made prefabs for a car, cyclist and pedestrian. When I try to drag them in to the Traffic input, nothing happens. In the manual I also can't find clarity.

What does the traffic assets field need?
What does the time controller need?

Thanks in advance,

Louis

[Bengel2004]

If you right-click in the project inspector > create > traffic > assets. Then you'll be able to create a traffic asset.
For the time controller create an empty game object and assign the time controller in the traffic manager.