I think what @DAN RO means is to add a additional rank to the game. Where the IGA act as a police of sorts the new Helper controls the roads, like how in real life there is an instance that closes roads if something major happens, regulates the amount of traffic coming in and/or closes certain lanes on the highway to warn people that there is a crash coming up.
I quite like the idea but I doubt it would be useful to implement, it sounds like (to my understanding) that you want to change up the entire system off traffic rules that are in place as highways are a major part of the game. I doubt its possible to make these kind of changes to the game let alone enforce them once they are in place, what rights would you say a helper has?? Can he ban or kick or just teleport people to services?
Overall I like the idea in theory but I doubt that it would prove useful in game.