Putting an RFID chip into the lane reflectors / raised pavement markers seems like it would be a good step, and could be useful both to autonomous systems and d

Putting an RFID chip into the lane reflectors / raised pavement markers seems like it would be a good step, and could be useful both to autonomous systems and driver-assist / navigation systems. I doubt it would add a significant percentage to their cost. The nice thing is that you really don't need to use any intelligence when placing the markers. They could be permanently set with a random GUID at time of manufacture, and then just installed in the road. After installation, someone (e.g. Google Maps car or crowdsourced project) could drive the road and cross-reference the RFID GUIDs to their actual location.