They're suppose to be excavating under the trains to create another level underground for union station. I think from that underground, there will be stairs to go up to Union Station exit/entrance beside Telus building.
If you walk the path between Union an ACC, you will see 2 construction doors at the south end.
The left one east path runs to Yonge St is new and well lighted.
The right runs into the lower level of Union where cars are wash and it is dull looking and poor lighting. It has a sloping floor going west as it connect to another ramp going north to another level of parking.
thanks marc again. The glass on this is just about done, all you have to do is fill the construction elevator, take down the crane and this one is pretty much done on the outside.
It is a fortunate thing that this building is surrounded by darker, more easily to distinguish from the sky structures because I would hate to be flying a plane and then smack right into Telus. I love the glass and especially the reflections coming off it in all lighting conditions. I think that this one is the best new tower in the vicinity.