M1 motorway the A5, the motorway takes a more northerly route through the East Midlands, via Leicester, Loughborough, Nottingham to Sheffield, where the M18 splits from the M1 at Junction 32 to head to Doncaster. Originally, the M1 was planned to end at Doncaster but it was decided to make what was going to be the "Leeds and Sheffield Spur" the primary route with the section to the A1(M) south of Doncaster given the separate motorway number M18. From Junction 32, the motorway passes Sheffield, Rotherham, Barnsley and Wakefield, reaching the original end of the motorway at (the original) Junction 44 to
M62 motorway 1974. On the first contract, care was needed at the River Calder crossing due to the alluvial bedrock. On the second contract precautions were taken as the length was built on old coal mine workings. The section between Ferrybridge and North Cave was the last to be planned and built. The Ouse Bridge, across the River Ouse west of Goole, commenced in January 1973 and is nearly long and rises to above ground level. Completion of the bridge was delayed due to "steel supplies [being] a chronic headache" and a partial collapse of the framework caused by bolts joining a