The return of the documentary following emergency patrol teams, beginning as the North East Control Team deal with a serious accident on the M18 near Doncaster.

The highest motorway in the UK and some of the worst winter weather imaginable mean a long and difficult night for the motorway patrollers.

In the north-east near Leeds, patrollers Helen and David are racing to a nightmare breakdown in the middle of an unlit section of the M1 when it's smashed into at high speed by another vehicle.

Just outside Manchester, patrollers Victoria and Darren fight their way through heavy traffic to reach a high-speed crash on the M62. It's a pile up with 15 people involved.

During rush hour northwest of England, patrollers Steven and Sue hit traffic jams near Warrington and discover a three-car RTC with one driver injured and trapped in her car.

Patrollers Chris and Woody work 12 of the busiest motorways in Britain including the M6. They race to the rescue of a young woman who swerved to avoid a tyre but crashed.

In the northeast near Leeds, patrollers Helen and David are racing to a nightmare breakdown. Meanwhile, outside Manchester, an elderly couple are stranded in the dark when their car suddenly stops in a live lane.

On the night shift in the control room near Leeds, motorway dispatcher Stuart spots a car crash on the busy M62, on CCTV. A pick-up truck towing a trailer spins out of control, flips over sideways and hits the crash barrier.