An autonomous emergency braking (AEB) system uses sensors tucked behind the rearview mirror to work out if you are about to have a crash and apply the brakes automatically to either prevent the crash at lower speeds or reduce its severity at higher speeds. Although some luxury segment cars are already equipped with an AEB system, we are seeing some volume producers fitting it as standard on certain models. That seems hardly surprising given that from next year automakers hoping to get a five star NCAP rating will have to put in an AEB system. Matthew Beecham asked Matthew Avery, Head of Research at the UK-based Motor Insurance Repair Research Centre (Thatcham) for his views on AEB. Thatcham has been a member of the European New Car Assessment Programme (Euro NCAP) since 2004.