Some reason for optimism:
"Andrew Hope, the chief capital officer for rapid transit with Metrolinx said lessons have been learned from the Eglinton Crosstown experience and put into practice with the Ontario Line subway now under construction. Instead of a massive, risky P3 contract – in which private sector bidders were no longer interested – the latest line was broken up into several more manageable pieces.
Parts of the Ontario Line, including its main operations and maintenance contract, are conventional P3s. Other chunks, however, use what the industry calls a “progressive” or “negotiated” model, which sees governments and contractors collaborate in the early design phases to iron out problems and anticipate cost overruns before a final price tag is set. This avoids a key issue with P3s, which generally force contractors to lock in pricing before they are able to do a fully costed design – a situation that set the stage for delays and lawsuits.
“The world has changed pretty dramatically,” Mr. Hope said. “We’ve learned a lot. Contractors have learned a lot.”"
These lessons have not kept a lid on price increases. In 2019, Ontario Line construction was pegged at $11-billion. Three years later and the cost, now including trains, signalling and 30 years of operations, was up to $19-billion. In 2024, it was up again, according to Global News, to $27-billion.