International Bridge, Tunnel and Turnpike Association [ IBTTA | American Toll Bridge Association | American Bridge, Tunnel and Turnpike Association ]
International Bridge, Tunnel and Turnpike Association [ IBTTA | American Toll Bridge Association | American Bridge, Tunnel and Turnpike Association ]
International Bodies and Committees | Tunnels, Overpasses and Bridges
Organismes et comités internationaux | Tunnels, viaducs et ponts