The Motorway S01E04 - Episode 4

Lives are endangered when a 40-ton truck illegally reverses down the M1 into the path of oncoming high-speed traffic, while control room staff are powerless to intervene with no patrol teams available. Elsewhere, another lorry driver hits a car and does not notice until he has driven for a quarter of a mile, while the motorway has to be closed down when a car drives into the back of an HGV.