Caption: The past few weekends have seen construction on the new South Blair Street grade separation intensify. WIth the underpass largely built, crews have been busy returning the GO Sub to it normal alignment. To make construction easier, GO trains east of Pickering have been operating on an hourly schedule, allowing crews more track access. In this scene (shot from the Hopkins Street overpass, which is slated to be demolished once the South Blair underpass opens), GO 656 slowly pulls eastbound train 910 through the construction site, while a signal technician reconnects the wiring on the top of the signal bridge which was temporarily dismantled during construction.