Manchester is gridlocked for over an hour when a multiple car pile-up blocks the M60 and patrollers Sharon and Tony are left to clean up the mess, but are surprised when one of those involved tells them he's just seen another crash. A monster pothole forces the team to temporarily shut down half of the M60 before someone is seriously injured, while eight miles of the M6 are brought to a standstill when they a flood of calls report a dog running up the middle of eight lanes of high-speed traffic.

Extreme snow and wind hits the West Midlands and causes chaos on the M6 for patrollers on night shift and when a pick-up truck flips upside down, a car heads the wrong way down the carriageway directly towards the crash site. While gritting teams are out in force trying to protect the roads, Paul and Aries fight in poor visibility to get a man to safety after he runs out of petrol in a live lane, while a driver on his way to Scotland is forced off the motorway when his windscreen wipers leave him with reduced visibility.