translate English to French: Ties changed in conjunction with rail, ballast or other track material programs shall be accounted for as follows: if fewer than 15 per cent of the ties in the section of track covered by the program are changed, they shall be considered spot replacement; otherwise, they are to be accounted for as programmed.
Traverses - le remplacement des traverses devra être comptabilisé comme prévu au programme, sauf dans le cas de remplacements partiels, de sinistre d’éboulements, d’effondrements, etc.