The A303 (Amesbury to Berwick Down) Development Consent Order 2023

An 11.6 kilometre length of new road

1.  An 11.6 km length of new road to be constructed and classified (as identified in sub-paragraphs (a) to (i) below) as part of the A303 trunk road (such length also including existing highway to be improved, as identified in sub-paragraphs (a) and (i) below)—

(a) commencing from a point 1.26 km to the east of the centre point of iron age hillfort Yarnbury Castle and following the existing A303 alignment for a distance of 1000 metres in a generally easterly direction to a point 1.85 km west of the junction of the existing A303 with Berwick Road B3083;

(b) then departing from the existing alignment in a north easterly direction, to the north of Winterbourne Stoke, for a distance of 1.74 km, to cross the route of the existing B3083 at a point 475 metres north of its junction with the existing A303;

(c) continuing to the north of Winterbourne Stoke for a distance of 517 metres and crossing the River Till on a new viaduct at a point 395 metres north of the existing A303 river crossing;

(d) departing from the River Till and continuing in a generally easterly direction for a distance of 1.48 km to a crossing point with the existing A303 at a point 693 metres to the west of the centre of the existing Longbarrow roundabout;

(e) passing beneath the new bridge at Longbarrow Junction which it is proposed will carry the realigned A360 and then continuing in an easterly direction for a distance of 694 metres to pass the existing A360 in cutting at a point 95 metres south of the centre of the existing Longbarrow roundabout;

(f) from the A360 continuing in a generally easterly direction, running parallel with and to the south of the existing A303 for a distance of 971 metres to the new western tunnel portal, at a point 940 metres to the west of the crossing point of existing byway AMES12 and 60 metres to the south of the existing A303 at that point;

(g) continuing within the new tunnel for a distance of 2.25 km, to the crossing point of the existing A303 located 920 metres east of the junction of byway AMES 11;

(h) continuing within the new tunnel in an easterly direction, for a distance of 1.01 km to the new eastern tunnel portal, located at a point 710 metres to the east of the junction of the existing A303 and Bridleway AMES10 and 65 metres to the north of the centre of the existing A303; and

(i) from the new eastern portal eastwards for a distance of 1.93 km, following the route of the existing A303 and continuing through the improved Countess junction on a new flyover, then terminating at a point located 630 metres to the east of the centre point of the existing Countess roundabout,

identified by a red line on the classification of roads plan.