Future of Roads | Heads of the Valleys road upgrade overcomes challenging ground conditions
Dualling the 17.3km stretch of the A465 Heads of the Valleys road between Dowlais Top and Hirwaun is the biggest road infrastructure project ever
Merthyr Tydfil United Kingdom Blaenau Gwent Brecon Beacons National Park Rhondda Cynon Taff Mike Cummine
Source: newcivilengineer.com