Anti-tailgater system

Ford in America is to pilot a system this year in which cars warn each other if they're driving too close, writes Brian Byrne.

This anti-tailgating system is based on short-distance wireless communication and GPS.

If you get too close to a car in front, lights will warn you to back off.

It can also warn of a hazard round the bend, where a car might be stopped.

To work effectively, the system needs to be in every car. There are also privacy issues to be worked out.

But the system would be cheap, about €80 a car.