公路和铁路的建造

This class includes: - construction of motorways, streets, roads, other vehicular and pedestrian ways - surface work on streets, roads, highways, bridges or tunnels: * asphalt paving of roads * road painting and other marking * installation of crash barriers, traffic signs and the like - construction of bridges, including those for elevated highways - construction of tunnels - construction of railways and subways - construction of airfield runways

This class excludes: - installation of street lighting and electrical signals, see 4321 - architectural and engineering activities, see 7110 - project management activities related to civil engineering works, see 7110