Heads of the Valleys Road

English A465 road Proper noun Heads of the Valleys Road The A465 trunk road in Wales, so-called for at least part of its length as it crosses the tops of the South Wales Valleys. en 1957 May D. S. Barrie From Abergavenny to Merthyr—2 Railway Magazine 345 Launched now on the long descent to Merthyr, initially at 1 in 38-40, the train skirts the town of Dowlais to the east and north, High Street Station standing high above the main Heads of the Valleys road. References Ordnance Survey map, Explorer 166 - Rhondda & Merthyr Tydfil. en Roads Wales