In sparsely populated areas smart roads could inform the car that there hasn't been any movement whatsoever in the whole area for hours. (Along the entire road

In sparsely populated areas smart roads could inform the car that there hasn't been any movement whatsoever in the whole area for hours. (Along the entire road and adjacent to the roads). How the car responds (driving somewhat faster, perhaps) could mean a large measure of safety as compared to when there are a large group of people about to cross a rural road at night that the car may or may not see visually. Anyway it's just one example. RFID or similar embedded beacons in the road paint would make roads much easier for cars to follow. They are expensive for any one company to do but cheap for the government to do if it is done everywhere at once and lasts 5-10 years. Road signs that broadcast what they are (instead of needing to be "seen" and interpreted visually instead of through radio by the car), are similar. Finally, a government standard could coordinate cars into a caravan, avoiding pileups for example, and giving the participating cars several advantages you can find by Googling "car caravan". (Though this might be achieved by industry.)