[hfx_chris]

What do you mean where would you run it? Halifax does have streets that run in a north-south direction.
Hollis, Lower Water or Brunswick Streets all jump out at me, and would require little (as I see it) in the way of alterations (aside of course for laying the actual track). Hell, Brunswick is wide enough for the north-bound leg, and Hollis could work for the south-bound. The beauty of using Brunswick is you could service Spring Garden with it as well, including a nice new terminal built-in to whatever redevelopment takes place at Queen and Spring Garden.