Don’t be surprised if you soon see solar powered sidewalks lighting up and providing us an interactive way to stroll and drive in. Solar Roadways has received a $100,000 grant from the Department of Transportation to build roads which can display warnings for pedestrians and drivers. Messages and warnings would apparently be shown somewhere in the future where solar panels will be used to power these LED warnings.
Subsequently, the road in front of the drivers would light up with LEDs, displaying the message. The panels themselves also come with a heating unit, so that when it snows, the panels are still readable. Microprocessors within the panels work as the communication between panels. Basically, it sounds like Solar Roadways have covered all their bases.
(Source) Slash Gear