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) the traffic went across a level crossing and through Sleaford's shopping area. The £5.7 million bypass opened on 16 September 1993, by Douglas Hogg, where there is a roundabout with the A153 and B1517. The A15 crosses the railway and River Slea, and then leaves the bypass at the "Holdingham Roundabout" with the A17 and B1518 (former route). As "Lincoln Road", it goes close to Leasingham meeting the B1209. There is a junction Cranwell with the B1429. It meets the B1191 (for Scopwick), B1202 (for Boothby Graffoe to the west and Metheringham to the east) next to the former RAF