Media playback is unsupported on your device

New HGV braking could save lives with quicker stops

23 May 2015 Last updated at 00:06 BST

One in ten vehicles on British motorways is a heavy goods vehicle (HGV) yet they are involved in half of all fatal accidents.

So anything that helps a lorry stop more quickly will be life-saving.

Cambridge University has got together with a number of companies, including Volvo, to work on a new braking system that chops a fifth off the stopping distance of an HGV.

It could be on the roads in just a few years.

The BBC's transport correspondent Richard Westcott went to see it in action,