Somebody just created a timeline to show all of the TTC construction since 1950 The TTC has been seeing changes since construction began on the Yonge-University line back in 1950. 19-year-old Rodney Chan, a member of public transit advocacy group TTCriders who has been travelling by way of TTC since middle school, just made the evolution of Toronto's transit lines a lot more visual. What started as a rough sketch on lined paper now serves as a comprehensive timeline of every TTC project ever started, cancelled and finished over the past 70 years. "I think we've all seen those 'Evolution of the TTC map' videos, but I always wondered how long each project took, from construction starting to opening, instead of just a timeline of opening dates," he told blogTO.