As the 21st century goes on, more advancements are being made to vehicles, as well as to the systems that control the traffic flow on roads. Since there are so many more people on the roads than ever before, the need for safer and more technologically advanced traffic...

Beacons have always acted as a means of warning sailors about problems at sea. They shone a light to direct ships safely into harbor. Lighthouses were one effective form of flashing beacons. They attracted attention to a specific site. Today, people turn to smaller...