The Alto project is a roughly 1,000-kilometre-long high-speed rail network between Toronto, Peterborough, Ottawa, Montréal, Laval,Trois-Rivières and Québec City. 

CDPQ Infra is a member and the lead of Cadence, a group of Canadian and international companies selected to develop the project after winning the government of Canada’s call for tender. In addition to CDPQ Infra, the group includes AtkinsRéalis, SYSTRA Canada, Keolis Canada, SNCF Voyageurs and Air Canada.