Renewal in main track:
- renewal of the apparatus of lanes and adjacent lanes,
- renewal of rails, sleepers and ballast,
- renewal only of the rails,
- renewal only of sleepers,
- ballast renewal,
- laying of underlayer.
Renewal in ancillary way:
- renewal of the apparatus of lanes and adjacent lanes,
- renewal of rails, sleepers and ballast,
- renewal only of the rails,
- renewal only of sleepers,
- ballast renewal.
See CSC.