Introduction: High-Speed Rail Challenges in North America and Europe High-speed rail projects worldwide face significant cost overruns and implementation challenges. As Canada advances its ambitious Ontario-Quebec ALTO high-speed rail project , examining the costly mistakes of California's High-Speed Rail (HSR) and Britain's HS2 provides crucial insights for successful project delivery. Critics in North America, often unfamiliar with high-speed rail benefits, frequently highlight California's HSR difficulties. Similarly, Britain's HS2 project faces intense scrutiny due to escalating costs that have nearly doubled original estimates. Canada's ALTO High-Speed Rail Project Overview The Cadence Consortium manages Canada's high-speed rail initiative, consisting of: CDPQ Infra AtkinsRéalis SYSTRA Canada Keolis Canada Air Canada SNCF Voyageurs Alto, a crown corporation, serves as the Project and Contracting Authority, responsible for development, impleme...