The length of the trunk road ceasing to be a trunk road starts from the centre of Llangua Bridge, coincident with the Monmouthshire/Herefordshire boundary, finishing at a point on the south western boundary of the A49/A465 Belmont Roundabout, Hereford but not including the circulatory carriageways or the south western splitter island of the Roundabout. It is shown by broad black dashes on the plan and is approximately 19 km in length.