Photo Courtesy of TTC A $2.5-billion subway extension is facing at least two years of delay. Related Links: Ten Drives, Four TBMs Build Toronto Subway Extension TTC Report The Toronto Transit Commission (TTC), seeking to minimize existing schedule overruns, has entered into an $80-million sole-source management agreement with Bechtel Canada for the remainder of the $2.5-billion Toronto-York Spadina Subway Extension (TYSSE), which will provide an 8.6- kilometer link between the city of Toronto and its neighboring authority, the Regional Municipality of York.In March, Sameh Ghaly, TTC chief capital officer, and Andy Bertolo, chief project manager, were axed. Then, the city