Schweizerische Industrie Gesellschaft
The first six CLRVs (4000–4005, class L1) were built by Schweizerische Industrie Gesellschaft (Swiss Industrial Company, SIG), and were tested in Switzerland serving as prototypes. The remaining 190 CLRVs (4010–4199, class L2) were built by Hawker Siddeley Canada Limited in Thunder Bay. The CLRVs went into revenue service on route 507 Long Branch on September 30, 1979. The vehicles were originally equipped with couplers, but these were removed between 1984 and 1988, and shields were placed over the empty coupler pockets to protect pedestrians.