The route of the new trunk road is a route at Burton Latimer in the County of Northamptonshire and is about 2.84 kilometres in length, starting at a point on the M1–A1 link road interchange 120 metres south-east of the bridge over the dismantled railway, going eastwards and then southwards to a point on the Trunk Road 230 metres north of the entrance to Buccleuch Farm.