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
M1 motorway the above schemes, the Highways Agency also plans to add capacity and improve flows on the following sections of motorway in the longer term. Plans to dual the A421 from Junction 13 to Milton Keynes and to add capacity to Junction 10a on the Luton spur are being developed. !scope=col|mile !scope=col|km !scope=col abbr="Southbound"|Southbound exits (B carriageway) !scope=col|Junction !scope=col abbr="Northbound"|Northbound exits (A carriageway) !scope=col|Coordinates Stansted Airport, Dartford, M11, M20 The M1 is the only UK motorway to use transition curves (spirals) to connect straights to curves (circles) as is usual with railways. This was found to be unnecessary and curves connect