The Smith-Family is driving on the highway to arrive to their holiday destination in Italy, as a car in front of them suddenly brakes. A truck accidently has lost demolition debris and thereby almost caused a multiple-vehicle collision. Mrs. Jones is driving the car just behind the truck and as her car brakes, it simultaneously sends a message to the following vehicles. Those activate the brakes too, shift down and forward the message to the cars behind them. In this way, also the following cars can immediately react. An accident has been successfully avoided and all vehicles can go ahead. Moreover, the truck informs the highway company, who instantly sends the cleaning crew.
At the first moment, this might seem since-fiction, but it isn’t. We call it: IoT (Internet of Things).