Regardless of who's right, testing went on for some 3 years, and then after it opened, everyone seemed to realize there was a problem for the first time. If the TTC or Metrolinx had no power to control traffic signals, it's not like they didn't have the right to raise issues and ask for help. Some want to blame City Hall, but City Hall did not do the testing, and as far as I can tell, they were not informed of the problem nor were requests for changes presented to them, until after Line 6 opened, and suddenly requests for change came in for both Lines 6 and 5, at which time Chow (and Ford) vowed to take immediate action. How this is City Hall's fault, is beyond me.