 The "Commission des transports du Québec" works with the freight carriers and the public transport.The "réseau routier québécois" (Quebec road network) is managed by the Société de l'assurance automobile du Québec (SAAQ) (Quebec Automobile Insurance Corporation) and consists of about of highways and national, regional, local, collector and forest roads.In addition, Quebec has almost 12,000 bridges, tunnels, retaining walls, culverts and other structures such as the Quebec Bridge, the Laviolette Bridge and the Louis-Hippolyte Lafontaine Bridge–Tunnel.