The B6174 is a short road in Longdendale. From traffic lights on the A560 in Hattersley it first heads east along Ashworth Lane. The A560 here is actually a bypass: the original route of that road went along what is now Chain Bar Lane, which the B6174 meets within a quarter of a mile. The ex-A560 then continues north-eastward into the centre of Mottram in Longdendale to reach a T-junction by a signpost-cum-weathercock, where it turns left.
The route now heads north along Market Street for a little under 200 yards to cross the A57 at traffic lights. This point marks the original eastern end of the A560 and also the original southern end of the B6174. Our road continues north along Stalybridge Road to end at a mini-roundabout on the A6018.
An amended OpenStreetMap trace for this route awaits uploading to the SABRE Wiki.