Documentary series following the army of workers who keep the traffic flowing on one of the busiest stretches of road in Britain - where the country's longest motorway, the M6, meets four other major routes.

Meet the Highways Agency staff who scour 450 motorway CCTV cameras, on the lookout for anything that that can cause a problem in this high-speed environment. Whether it is a lost caravan wheel in the fast lane or a broken-down sewage lorry straddling the slow lane, their mission is to alert other drivers to the danger and to clear the lanes as quickly as possible.

Out on the road, pothole inspector Steve Taylor travels the motorway at a steady 50mph on the lookout for potentially dangerous potholes in need of urgent repair. Steve feels he's stuck right in the middle of a go-fast world, as his team of road workers have to close a carriageway of the M6 to fill a pothole - and face the wrath of frustrated drivers.

The Central Motorway Police Group is a specialist team working across the West Midlands motorways. PCs Mark Crozier and Karl Davies work for the Collision Investigation Unit. They respond to a fatal incident where a person has jumped from a motorway bridge on to a live carriageway in the early hours of a Saturday morning. The resulting investigation means two different motorways are closed for a number of hours but whilst the subsequent congestion is a problem, it is the emotional cost to those working in a high-speed environment that is all too evident. To help them cope with incidents like this, chaplain Viv Baldwin volunteers one day a week as an independent listening ear for police officers dealing with the more traumatic aspects of the motorway. Show less