The route of the new trunk road is a route about 10.73 kilometres in length starting at a point on the western side of Farnham Road (A325) at Ham Barn, about 320 metres north of the Greatham Bridge, and proceeding south-westwards, then generally southwards, to pass to the west of Burgates, West Liss and Liss and north-west of Sheet, before running westwards, then generally southwards, to pass to the north and west of Petersfield to end at a point on the north-western side of the Trunk Road about 465 metres south-west of its junction with Ramsdean Lane, Weston, all in the District of East Hampshire in the County of Hampshire.