In the near future, our highways could be made of Plastic. PlasticRoad is a concept for prefabricated Road sections. The modular sections are made from 100% recycled material and the construction time is about 70% less.
They're 4x lighter and last 3x longer than traditional pavement. So the sections are essentially maintenance free. The roads even have a hollow underside for pipes, cables, and rainwater. PlaticRoad is still in the concept phase.