If the technical computer scientist Lennart Klaver has his way, cars will soon be talking to their fellow road users through their headlights and tail-lights. This will take place through a type of Morse code, but at such high frequencies that the flickering cannot be seen by the human eye. Klaver: ‘Nearly all cars now have LED lights, and these can communicate information. For example, they could signal the speed at which the car in front is braking, allowing your car to adjust its own speed accordingly. One nice thing about light is that it can be directed. This is a very positive characteristic for network technology, as it translates into energy conservation. It makes a difference whether light (i.e. information) is directed towards a single receiver or towards the entire surrounding area’.