“We were driving at a normal speed in a parking lot in Las Vegas. A sensor in the minivan was connected to a receiver located on a traffic light, which was also in the trunk of another minivan. The driver was speeding along, glancing down at a display. The car slowed, but it wasn’t being driven autonomously. Instead, the driver was adjusting speed based on a display that estimated how long it would take to get to the light just as it turned green. When the car knows the light will change, there will be a 15 percent savings in fuel economy by maintaining speed.” Read more at Venture Beat.