4212 Construction of railways and underground railways

This subcategory includes:

• railway roadbeds for long-line and commuter rails, street tramways, and underground or elevated urban rapid transit systems
• railway electrification structures, including catenary systems, substations, and associated electrical infrastructures

This subcategory excludes:

• rail stations and passenger facilities, see 41.00.45
• tunnels for underground rail traffic, see 42.13.10
• installation of lighting and electrical signals, see 43.21.00

This subcategory includes:

• construction works for railways, including underground railways:
• laying works of ballast and rails
• installation works of switch gear, points and crossings
• construction works of control and safety systems for railway tracks
• construction works for funicular railways and cable car systems
• construction works for electricity overhead lines and conductor rails for railways
• renovation or repair works for railway track
• grinding of rails as part of maintenance or refurbishment
• installation and replacement of sleepers (railroad ties)

This subcategory excludes:

• construction works for tunnels for underground railways, see 42.13.20
• installation of lighting and electrical signals, see 43.21.00