|Location Map ( geo)|
|Distance:||4 miles (6.4 km)|
|Meets:||A73, B802, A8, A723, A775, B7029, A723|
|Old route now:||B802|
|Route outline (key)|
The B799 runs from Chapelhall to Motherwell in North Lanarkshire.
The road starts at a T-junction on the A73 in Chapelhall and runs south west down the main shopping street and across a roundabout to a GSJ with the A8. The Edinburgh-bound carriageway of the A8 is accessed via the B802, which terminates here, whilst the Glasgow-bound carriageway is accessed directly. Another roundabout gives access to the Newhouse Industrial Estate, and then the road meets the A775 and A723 at the next roundabout.
A short multiplex westwards along the A775 leads to the next section of the B799, which now heads southwards through New Stevenston and across the railway to a short multiplex eastwards with the B7029 (the old crossing, a level crossing which required no multiplex, is now closed).
A roundabout sees the two routes split again, with the road running between houses and a golf course to its terminus at a second encounter with the A723 at the mini-roundabout junction between Jerviston Road and Merry Street on the north east side of Motherwell.
The original route of the B799 (dating from around 1930) was significantly different to the north, but the same as it is today to the south. The original start point was on the A8 (present A89) in Airdrie town centre, after which the road ran south along what is now the B802. The new route of the B799 through Chapelhall was originally the B7028. The precise time and reason for the change are currently uncertain. The B802 has been straightened in a couple of places since it was the B799, and diverted to the north of the A8 to create one junction in place of the two previously encountered.