Đông Hà is the capital of Quảng Trị Province, Vietnam. Đông Hà is situated at the crossroads of National Highway 1A and Route 9, part …Đông Hà is the capital of Quảng Trị Province, Vietnam. Đông Hà is situated at the crossroads of National Highway 1A and Route 9, part of the East–West Economic Corridor. It lies on the North–South Railway and is served by Đông Hà Railway Station. EWEC is an economic development program which includes northeast Thailand, Southern Laos, and central Vietnam.