Widening works on the M1 in Hertfordshire, showing slipform paving machines laying the surface of a new road alongside the existing carriageways. Starting in 1981, widening work was carried out on the M1 between Junctions 5 (South Watford) and Junction 8 (Hemel Hempstead). The aim was to convert the existing two-lane carriageways from Junctions 5 - 7 and three lane carriageways from Junctions 7 - 8 into three lanes southbound, three lanes northbound from Junctions 5 - 6, and four lanes northbound from Junctions 6 - 8.
Pixel Dimensions (W x H) : 5161x6533
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