Lump sums? Hell no...They're just breaking up the scope of work.
They tried lots of small contracts on the TYSSE. That didn't work...so they had 2 giant contracts for the crosstown...that was worse. Now they're trying to meet in the middle.
Okay, let's analyze these points then.
Here are 5 other suburban streets/Roads with good, or decent transit:
1. Gerrard (A streetcar suburban street is still a suburban street)
4. Allen Road
5. Eglinton (Yes it's suburban along most of its length).
Streets are dynamic and...
Because the crosstown is to be operated by the TTC
Because the crosstown is a part of the TTC Network
Because TTC services directly integrate with the Crosstown
Because the crosstown will use TTC fares.
Because the TTC is paying for operations of the crosstown
And that is just for this line...
Perhaps transferring all the risk to the private sector, specifically the GC was always a stupid and impossible thing to do, especially when cost overruns are largely caused by things like unknown utilities and traffic control, things Metrolinx should have always taken the risk for.