Metrolinx employees have access to either their own app or web app. This wasn't second hand; she literally showed me the "progress ring" that said, "44% readiness". I was surprised, given likely NDAs in her work contract, that she even shared this info with me. Even though her job makes her privy to a great many things, she pointed out that Verster intentionally kept things from different departments, with no explanation as to why.
As I noted, the 44% was in January of 2024. But from what I was to understand, "readiness" equated to "completion", ie; handover to the TTC.