High in the Pennines on the M62, a driver gets trapped in the snow in an extremely dangerous location, with high-speed traffic in danger of smashing into the stranded car. Just north of Manchester, heavy rain, sleet and snow on the M60 create treacherous conditions and a driver spins his supercar off the carriageway, taking out a 20ft section of the crash barrier in the process.

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, nine wrecked cars — and one of them spilling fuel onto the motorway. The M62 is blocked, they have more than a thousand cars trapped behind the crash site, and the jam is growing by the minute. In a major incident like this, the M62 won't be back up to full speed until the early hours of the morning. Patrollers Adam and David are looking for anything that could be a hazard to high-speed traffic. Debris on the roads causes thousands of accidents a year, and today they find a garden fork, then a spade, followed by an entire garden shed in the middle of the M62! A simple breakdown on the hard shoulder becomes a tiring afternoon for one lone motorbiker, who is determined to push his machine all the way home. But it's four miles to the nearest exit, so with the added danger of being hit by a passing lorry, the traffic officers decide to escort him until he gets off the motorway. And a diesel spillage on a major interchange of the M62 near Bradford causes chaos. With one car already skidded off the roundabout, Adam and David must close the junction. But with 5,000 vehicles an hour diverted, not everyone is happy and one lorry driver attempts to drive through the road block.