A cold windy day got me playing with my toys, I selected a double decker London bus and a few figurines, a sheet of black sandpaper makes a realistic road surface, all of these were shot with a 14 42 kit lens on my old Panna G10, I hope they inspire you.
Jon you need to cut holes in the sandpaper to mimic the numerous potholes. Plus for this Winter and Spring pour large amounts of water over your roads. Oh I forgot, great idea. Ken