The route of the new trunk road is 140 metres in length and is at Twowatersfoot in the County of Cornwall. It starts at a point on the trunk road opposite the junction with the classified road C036 to St. Neot and runs south-westwards to a point on the trunk road 152 metres from its junction with the classified road C036 to St. Neot.
The length of the trunk road ceasing to be trunk road is that length which starts at a point on the trunk road opposite the junction with the classified road C036 to St. Neot and runs south-westwards for a distance of 122 metres.