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 discussion by their county highway authorities. At the same time, it was envisaged that a route between Liverpool and Hull was needed to connect the ports to industrial Yorkshire. After the Second World War, the Minister of Transport appointed engineers to inspect road standards between the A580 road ("East Lancashire Road") in Swinton and the A1 road near Selby. The 1949 Road Plan for South Lancashire identified the need to upgrade the A580 to dual carriageway with grade separation and provide bypasses at Huyton and Cadishead. In 1952, the route for a trans-Pennine motorway, the Lancashire–Yorkshire Motorway, was laid down,