Nelson, Lancashire the estate contains a further 151 units, principally occupied by small and medium sized enterprises engaged in office and light industrial uses. Nelson is served by Junction 13 of the M65 motorway, which runs west to Burnley, Accrington, Blackburn and Preston, and northeast to Colne. From the town centre, the A56 runs southwest to the M65 at Brierfield and northeast to Colne and beyond, while the A682 – Britain's most dangerous road – heads north into the Yorkshire Dales. In November 1969, a multi-storey car park with space for 350 cars was opened in Nelson. In December 2008, the town's
M6 motorway 1970, the Lancaster–Penrith link was completed, along with a short section of motorway by-passing the south of Walsall. The most northerly section of the motorway also opened in 1970, running to the designated terminus north of Carlisle. By 1971, the full route was completed between the junction with the M1 motorway at Rugby and the A38 road several miles north-east of Birmingham city centre, including Bromford Viaduct between Castle Bromwich (J5) and Gravelly Hill (J6), which at 3½ miles is the longest viaduct in Great Britain. Junction 6 in Birmingham is widely known as Spaghetti Junction because of its complexity