Construction of roads and railways

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 - construction of bridges for elevated motorways and railways - construction of tunnels, including those for motorways and railways - construction of railways, underground railways and subways - construction of electricity overhead lines and conductor rails for railways - 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