People are making cars that can communicate with other cars, street lights, and more. There are three layers to these cars. The first layer is v2e or vehicle to environment witch means they're on there own.    It also has adaptive cruise control, active lane departure, and rear sensing technology. The car can also see things around it, too. the other versions of this system fills a trunk but in this car it only tacks up about a shoe box.  The second layer is vehicle to vehicle. These cars also communicate with each other. Also they can see a car in front of the one there behind. the also pick up  gps signals. The last layer is v2i or vehicle  to infrastructure.  It can also communicate with street lights and stop lights as well. It also has congestion management witch helps with traffic.