Quote:
Originally Posted by VivaLFuego
Is there any decent precedent for constructing an infill subway station from scratch along a live railroad? I'm sure it's technically possible but it seems like an immense project (e.g. hundreds of millions of dollars fully burdened with design costs and such - think of the costs involved in the Roosevelt Connector project in the early 90s to build a new flying junction to create the current Red Line routing, or of course Block 37 which is just a flat junction). The 'infill' station projects in rail networks nationwide that come to mind tend to be either elevated or at grade, and in best cases exist where the original line was built to allow for it. To my knowledge the only such unused 'hook' for easy(er) expansion or construction in CTA's subway system is the flying junction under Lake and Canal.
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Not along a live railroad, but the two underground stations on Metrolink in St. Louis were built into a tunnel not designed for them. From the looks of it, they were a simple cut-and-cover job.
Conceptually, I can think of a few methodologies to build an infill station that wouldn't require a total shutdown of the line. You could probably get away with a total shutdown on Clybourn, fortunately, which would make matters easier.
Also... IF the Clinton Subway is ever built, plans include a station at Division/Larrabee, pretty close to Clybourn/Goethe.