Police's "undercover lorry"

New tactics are being used by traffic police in South Yorkshire to clamp down on drivers breaking the rules of the road. Calendar's Matt Price has been out on patrol with the motorway officers targeting people using their phones and laptops and even sitting with their feet up behind the wheel.

Police have stopped drivers on their phones and without seatbelts. One man caught driving for too long on M18

PC Darrell McPherson explains how the "undercover lorry" is catching law-breaking drivers.

A police lorry has taken to motorways in South Yorkshire as the force cracks down on motorists committing driving offences. Officers will be able to look directly into the cabs of commercial vehicles to catch drivers using mobile phones and laptops behind the wheel.