The B8048 starts on the A806 (formerly the A8006) to the south of Kirkintilloch town centre and heads eastwards through the town, passing playing fields on the left. After crossing the Luggie Water on Oxgang Bridge, the road turns right at a roundabout, with the housing and schools gradually fading away, leading to open fields. After around a mile and a half of open countryside, the road turns right at a mini roundabout, over a railway bridge and then left at another roundabout. These are the first in a series of regular roundabouts as the road runs through the Blackwood area of Cumbernauld.
At the 5th roundabout, the B802 joins from the north, with a short multiplex to the next, much larger, Craiglinn Roundabout. Here the B802 heads off south towards Airdrie, whilst the B8048 enjoys a short dualled section to the Black O' Hill Roundabout. The dual continues south to meet the A8011 and M80 (no access), whilst the B8048 itself continues to meet the M80 properly at Auchenkilns Junction, a dumbell junction at the start of the A73.
