This was a really clever idea for the them, and I enjoyed it quite a bit.
Though it was a bit fiddly having to click at every intersection, even when I just wanted them to drive straight. I dunno if that was a limitation due to time or an intentional gameplay choice.
Also, after hitting a great stride, I lost after a car spawned one road away from it's destination. I clicked on it thinking it would be easy, but because they only start moving after you pick two spots, it just didn't move. (At least, I think that's what happened.)