A465 Heads of the Valleys road reopens after Hirwaun crash 31 May 2013 Last updated at 16:19 A two-car crash closed the main corridor between the south Wales Valleys and Neath on Friday afternoon. The incident happened on the A465 Heads of the Vallleys road between Hirwaun and Merthyr Tydfil. One vehicle was reported to have left the carriageway and was on an embankment, causing tailbacks. The road reopened after the incident between the Hirwaun and A470 Cefn Coed roundabouts at 14:15 BST.