|Location Map ( geo)|
|To:||Central Way, Cumbernauld (NS753738)|
|Via:||Stirling Road, Jane's Brae|
|Distance:||2.7 miles (4.3 km)|
|Meets:||A73, B8054, A8011|
|Route outline (key)|
The southernmost point of the B8039 is a restricted junction with the A73 at Riggend, giving access from the B8039 to the A73 in the southbound direction only. The Blackbog Road flyover of the A73, 500 m to the north, provides access to the B8039 from the northbound A73 and there is also a slip from the southbound A73 here.
The B8039 follows the old line of the A73 along Stirling Road. At one time it passed through the village of Luggiebank, but in the early 1980s a new road was built to improve access to Blairlinn Industrial Estate, by-passing the village. The old road terminates at the old bridge over the Luggie Water and becomes a footpath.
The new alignment meets the B8054 Lenziemill Road at a half-built dumbbell junction, where the flyover was never constructed, leaving just the two roundabouts at the end of what would have been the sliproads. The road is now dualled, and just as the two carriageways come together, sliproads leave for the next junction. This is a complete GSJ, albeit with the unclassified South Carbrain Road, although there are two right turns on that road. Continuing as the dual-carriageway Jane's Brae, the B8039 runs north and meets a pair of south-facing slips with the unclassified North Carbrain Road immediately before reaching its terminus at a final grade-separated junction, this time a squished Trumpet design, with the A8011 (the Langlands Seafar interchange) in central Cumbernauld; the junction merges into the adjacent roundabout GSJ so is more complicated than it appears.