Fun little game, could easily be fleshed out for more.
Two potential changes that could be made;
Rotate the intersections on some junctions. going from 1 - 6 means you always make the same trip at an intersection.
Maybe the rep could improve skills at certain points, i.e. 10 rep means you can roll a 3-6 for your edge moves.
I made a video for YouTube just showcasing the game (hopefully, I didn't miss to much in the rules)