This is actually kind of cool! It would be very interesting to see, especially when cars come out for people. My only concern is if you have to have a certain type of road set up, etc. because we do not want to alter the city as such. As long as everything can stay as it is road and buildings wise and such I am all for it! It will also add a cool roleplay aspect when things like cars and police are added. Just my opinion!
EDIT: After completely watching the video, and how it is setup, I have my doubts about how efficient it will be to set up. Looks like kind of a pain, and it also seems like a lot can go wrong and not work with the car plugin that we will be using. I don't know, but if everything works out, I'm for it, but I don't want things to change over this.