The contract value was not disclosed, although London Trackwork says the order is worth "several million dollars" and includes No 6, 8 and 12 geometry turnouts with single and double crossovers.

The 13-station Confederation Line will link Tunney's Pasture in the west of the city with Blair in the east and includes a 2.5km tunnel beneath the city centre.

The line is being constructed by the Rideau Transit Group consortium including ACS Infrastructure Canada, Dragados, SNC-Lavalin, EllisDon, Veolia, and Alstom, which was awarded the $C 2.1bn ($US 1.86bn) design-build-finance-maintain contract by the City of Ottawa in 2012.