A15 road (England) over the old route of the A15 (B1206) and over the South Trans-Pennine railway. At junction 5, the A15 reforms at the dual-grade "Barnetby Top Interchange", which is crossed by the Viking Way and has an exit to Elsham. It continues north as a dual carriageway which carries about as little traffic as the M180. The M180 drops to two lanes under this roundabout and continues to Grimsby and Immingham as the A180. The A15 towards the Humber Bridge, goes directly across the runways of the former RAF Bomber Command airfield at RAF Elsham Wolds (where over 1000 of its
A15 road (England) passes the Burghley Centre (shops), and Bourne Bus Station. At the two miniature roundabouts the name changes to North Road, which name it keeps until it reaches Morton. Just outside Bourne, at , the route of (Roman) King Street heads off across the fields to Stainfield and Ancaster but the A15 continues north along the line of another Roman road, Mareham Lane. It passes close to Dyke, and goes through Morton as "Bourne Road", passing the "Lord Nelson" pub. It becomes "Folkingham Road" there is a right turn for Haconby and a junction with the B1177 (for Billingborough). Close by