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  #13741  
Old Posted Sep 15, 2017, 8:56 PM
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Quote:
Originally Posted by aaron38 View Post
Also, I heard someone mention a proposed 15th street station on the Red Line. I didn't find any info on that. Is that a real proposal?
Related Midwest wants a 15th street station, along with a new Metra station, for their proposal on the 62-acres they own. They admitted in a Tribune article back in May that they haven't contacted the CTA or Metra about it, but hopefully they have done so at this point.
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  #13742  
Old Posted Sep 16, 2017, 3:08 PM
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Seems like a 15th St Red Line would be tricky given that it is on an incline. There is space to excavate a station, but the neighborhood might not be happy with increased foot traffic on 15th.

They should consider putting some money towards a Clinton St subway line, but I can't imagine that even has a chance to get off the ground until there are solid development proposals in the SW Loop (i.e. the dead zone Dan Ryan to the river, south of Congress) and the Riverline project is well underway. Perhaps CTA/City should be looking at protecting a new subway route.
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  #13743  
Old Posted Sep 16, 2017, 9:23 PM
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At 15th Street the Red Line tunnel is still east of Clark, which works poorly for what should be a massive development that deserves a station closer to its middle.

On top of that, the initial (and in the long term likely the tallest and largest) developments will probably be on the northern portions of the parcel -- where Red Line Roosevelt is actually a shorter walk.

Is there physical and operational leeway to run an unmanned piston shuttle between this giant development and LaSalle St Station, to essentially make it a virtual extension of the southwest Loop?

Finally, the Union Station tracks are so tantalizingly close to this site; has anyone ever thought of a bridge or tunnel at the northern end of this site to link it to Union Station (and then maybe through-route it up to Finkl or the Metra lines)? There seems to be ample space on both sides of the river for it.
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  #13744  
Old Posted Sep 16, 2017, 11:02 PM
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No, the main exit from a Red Line station could easily be on the site:



Interestingly, this weekend Metra is replacing the diamonds where the Rock Island crosses the St Charles Air Line and the CN Freeport Sub. That's work that might need to be redone if Related succeeds in moving the Metra tracks to run up the middle of their site.
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  #13745  
Old Posted Sep 17, 2017, 8:11 AM
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^ So is that 8 diamonds? Sounds like small dollars regardless.

Are we wed to an infill station being precisely at 15th Street (as in that diagram)? Is this because cut-and-cover has already been completed so they need only excavate the lid? Or because further south the tracks are at an incline? Because if Rock Island is relocated, it seems like a station straddling Clark or west of it would be a bit better of a location. Minor matter though, compared to whether and how Rock Island would be relocated.
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  #13746  
Old Posted Sep 17, 2017, 2:35 PM
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My map doesn't show a station; it shows the small CTA substation building that's already there.

My assumption is that a new 10-car station would stretch from roughly the north curb of 15th southwest past the current Metra Rock Island tracks. The entrances could be both east and west of Clark, but it's less confusing for us to call the station "15th."
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  #13747  
Old Posted Sep 17, 2017, 8:59 PM
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When you say your map ... I'm guessing this probably is really a map you made and manage? (That must be another substation at 14th Place, in the same gray, or an electrical utility yard since it's somewhat large.) So this is how you play god in the South Loop, publishing whatever images will suit your diabolical plans.

I just realized it's not immediately obvious why the expensive Red Line connector tunnel was necessary; Loop subway trains were already capable of connection to the Dan Ryan because Lake - Dan Ryan was a pre 1990s line and the 13th St portal brought those Loop subway trains onto that right of way. Was it just the congestion of switching between inner and outer tracks around 16th and 17th?
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  #13748  
Old Posted Sep 18, 2017, 1:52 AM
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Yes, I've drawn many maps of Chicago, including one showing every structure in the central area.

The HoDaR realignment of 1993 was to better balance the heaviest lines. Dan Ryan had far more ridership than Lake, and Howard far more than Jackson Park/Englewood. It was thought that squeezing the new Red Line, the Green Line, and the new Orange Line through 17th Tower and Junction would be too much. A new smoothly curving alignment would save at least 60 seconds over the sharp curves onto and off the 18th Street structure. That structure was itself in danger of failure, supported by emergency cribbing and needing extensive repair.
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  #13749  
Old Posted Sep 19, 2017, 3:57 AM
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Quote:
Originally Posted by Mr Downtown View Post
My map doesn't show a station; it shows the small CTA substation building that's already there.

My assumption is that a new 10-car station would stretch from roughly the north curb of 15th southwest past the current Metra Rock Island tracks. The entrances could be both east and west of Clark, but it's less confusing for us to call the station "15th."
Wouldn't that result in curving (and possibly sloping) platforms? I guess that's not a deal breaker, CTA already operates curved platforms on the Blue Line at Jeff Park/Addison/Kedzie.
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  #13750  
Old Posted Sep 19, 2017, 7:45 PM
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I think a slight curve wouldn't be a dealbreaker; you can put up CCTVs so the operator can observe the rear doors. Lots of examples around the world.

As for the slope, that's a little more problematic with CTA's dynamic brakes—though I think a couple of the Kennedy Expressway stations might not be totally flat. I've speculated that they might be able to increase the slope a wee bit for both approaches in order to have 500 feet of level track at the station. It might be easiest to dig 1000 feet of new cut-and-cover subway just west of the current tunnel with the new station (or at least the west half of it) on a straight, level alignment. Then the current tunnel could be abandoned/turned into the northbound platform. All this gets much easier once the Rock Island is realigned.
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  #13751  
Old Posted Sep 19, 2017, 10:29 PM
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Chicago-Columbus-Pittsburg hyperloop?

I hadn't heard of this:
https://hyperloop-one.com/blog/state...sburgh-chicago
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  #13752  
Old Posted Yesterday, 3:40 PM
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^^ yeah, I know certain newer systems like Montreal's have the track slope up slightly on the approach to stations, so gravity can assist with braking and acceleration.

Anyway, the more I think about this, the more it sounds like it will exceed Related's budget. Certainly this should cost more than $100M, especially if prevailing wage is required and costly mitigation is needed for Dearborn Park residents. Maybe CTA should just buy out that whole block of 15th.
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