The lengths of road ceasing to be a trunk road:–
1. that length of the trunk road some 1.3 kilometres in length and including the existing roundabout, starting at a point 260 metres south-west of Dulais Farm, Aberdulais and terminating at its junction with the A4109 near Aberdulais.
2. that length of the trunk road some 12.07 kilometres in length starting at its junction with the A4190 and terminating at its junction with the B4242 at Glynneath.