Not a bad idea. I wouldn't be surprised if a type of transponder unit was installed at say, 1/2 mile or 1 mile increments along stretches of freeways or highways. The units would then be able communicate with the cars onboard system and could relay information about upcoming traffic jams, accidents, weather conditions or construction. Off the top of my head, the only downside I can see would be the required power for each and every unit along a given stretch... which 'could' eventually add up to a substantial amount. I'm not sure how much power would be needed for a unit like that though.How about encoding the road layout in wide infrared paint strips on the road. You car reads the information from the encoded road and knows about the 30 degree curve and stop sign ahead. Add a radar system, and a full mesh car computer to car computer communication and your are done.
Initially, I think that would happen. The problem is, I think over time, people would become more and more comfortable with it and complacent and not pay much attention. Considering there are already nitwits driving off the road while following their GPS/navigation device thingy without paying attention to whether the road it has programmed in is really present, I don't think it would take long before cars on autopilot were driving into lakes when someone programmed a right instead of a left into the directions and the driver wasn't paying any attention.The only problem I have with systems like this, is that I don't think I would ever trust it 100%. In other words, even though it would take over driving for me, I would still have to keep my hands close to the steering wheel and continue to maintain full attention in anticipation of having to make a correction.... or an emergency maneuver.