You would have to be smarter about it than wait for local gov. Vision systems that can read street signs. etc. OCR on street signs should be pretty easy since they use High contrast simple fonts.
Right now all the telematics stuff is broken in to pieces you could do a lot of neat stuff if they were better integrated. You could use that preemptive braking stuff to decide I am in traffic on an interstate an find a new route.(Hint if the speed limit is sixty and I am with in a few feet of the guy in front of me and my current speed is below 5mph I am in traffic and the gps system should reroute me.)