Richard Westcott explains how the cars avoid hitting people
Media playback is unsupported on your device

Driverless cars 'coming to UK streets'

Cars with no drivers could soon be a common sight on British roads.

Driverless technology is being trialled across the country, assisted by £19m of Government funding.

Richard Westcott reports.

Go to next video: How to 'drive' a driverless car?