You seriously think that project would be simpler than just starting up a bus service? The Qline cost $187 million for 3.3 measly miles. A light rail in the median of I-94 from Merriman Rd. to Michigan Ave., and from there to Campus Martius would be some 18 miles long. You'd have to expand no less than 15 overpasses, and deal with a 2.5 mile stretch east of the River Rouge where there *isn't* any median. And that doesn't even address having to build crossings over emergency vehicle turnarounds.
Of course it's technically feasible, but that bears no relation to being politically feasible. I'm a railfan but a frequent express bus from the ground transportation area at Metro to downtown is infinitely more realistic.
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