Regarding what @44North mentioned, my preferred alignment for Strachan to Parliament is Option 3C, North of Rail Alignment.
In the City Planning proposal, this would see the Waterfront LRT continue east from the existing Exhibition GO Station, along the go rail corridor in an exclusive right-of-way with a terminus at Bathurst and Front street. I'd modify this proposal to, rather than have the line terminate at Bathurst and Front, extend it east to Union along Front Street in a in-street right-of-way.
The Union Station connection would be the most challenging component of this proposal. The cheap option would be to have the streetcar connect to Union Station with a surface stop at Front, and stairs leading down to concourse level. From there, the LRT would continue east along Front, and then turn south along either Bay or Yonge to connect to Queens Quay East.
The more expensive option would be to have the LRT continue south via Lower Simcoe and go underground north of Bremner. The LRT tunnel would turn east from Lower Simcoe onto Bremner, where it would connect to the existing Union Station streetcar tunnel. This would require a half kilometre of tunnelling, and building a new junction to connect to the existing streetcar tunnel.
The third option would be to follow the same alignment as Option 2, but not go underground until Bremner and York. That would require only 300 metres of tunnelling, but would require the LRT to traverse left and right turns at Front and Lower Simcoe and at Bremner and Lower Simcoe.
I like these proposals because:
- It won't duplicate existing transit services provided by the 509 Harbourfront Streetcar
- The dedicated right-of-way along the GO rail corridor would provide more than three kilometres of true rapid transit.
- Far fewer traffic lights than any other alignment
- It's currently a 21 minute trip between Exhibition and Union via the 509. My proposal would likely cut that travel time in half (if not more).
- This would likely eliminate the need to rebuild Union Station Loop.
First option, with surface LRT in red, and separated LRT in green.
Here's a map of the second and third options, with surface LRT in red, and separated LRT in green.