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Old 11-07-2018, 10:00 AM   #2881
Arlington
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Re: Green Line Extension to Medford & Union Sq

The concepts that I have seen for a GLX between Union and Porter Squares generally do propose an intermediate stop.

The exact cross street is the kind of thing that you'd have to have a lot of local input on. I seem to recall any of those 4 "midpoint" streets: Sacramento, Kent, Park, or Dane.
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Old 11-07-2018, 10:17 AM   #2882
F-Line to Dudley
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Re: Green Line Extension to Medford & Union Sq

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Originally Posted by Arlington View Post
The concepts that I have seen for a GLX between Union and Porter Squares generally do propose an intermediate stop.

The exact cross street is the kind of thing that you'd have to have a lot of local input on. I seem to recall any of those 4 "midpoint" streets: Sacramento, Kent, Park, or Dane.

Conway Park (Kent/Park block) and Wilson Sq. (Elm/Sacramento block) are the likeliest picks for catchments and avg. stop spacing. Conway if you're cost-constrained and doing only 1 stop, because the park itself makes for a ready-made egress. I do think Wilson's worth shooting for for the split-off of Davis-via-Elm buses. ROW's all ex- quad track until the inevitable slip-under of the Porter CR platform in a shallow tunnel, so thankfully choice of intermediates doesn't incur anywhere close to the extra landscaping costs of all the Medford Branch intermediates. You can hedge on two spacers without a cost blowout.


NOTE: Park St. grade crossing would be eliminated with a Dane-like overpass because the rail traffic spike would be too excessive to retain the crossing. So the Conway stop is almost certainly going to abut the park for access and not the present-day crossing.
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Old 11-07-2018, 10:32 AM   #2883
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Re: Green Line Extension to Medford & Union Sq

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Originally Posted by F-Line to Dudley View Post
Conway Park (Kent/Park block) and Wilson Sq. (Elm/Sacramento block) are the likeliest picks for catchments and avg. stop spacing. Conway if you're cost-constrained and doing only 1 stop, because the park itself makes for a ready-made egress. I do think Wilson's worth shooting for for the split-off of Davis-via-Elm buses. ROW's all ex- quad track until the inevitable slip-under of the Porter CR platform in a shallow tunnel, so thankfully choice of intermediates doesn't incur anywhere close to the extra landscaping costs of all the Medford Branch intermediates. You can hedge on two spacers without a cost blowout.


NOTE: Park St. grade crossing would be eliminated with a Dane-like overpass because the rail traffic spike would be too excessive to retain the crossing. So the Conway stop is almost certainly going to abut the park for access and not the present-day crossing.
How would access work to the south from a Conway Park station? Stairs (and elevator?) up to Park St overpass height?
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Old 11-07-2018, 11:30 AM   #2884
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Re: Green Line Extension to Medford & Union Sq

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How would access work to the south from a Conway Park station? Stairs (and elevator?) up to Park St overpass height?

Cheaply: just a solo egress into the park at mid-block.



Ideally: side path to Park at ROW level, then snaking around a ramp to where the overpass ends...no stairs necessary. Don't forget that the Park grade crossing is already in the middle of a pronounced 'dip' in the road, so the default geometry is ideal for spanning with an overpass that more or less splits the difference. Only reason Park wasn't eliminated in the 50's like Dane, etc. was an adjacent factory loading dock with a freight siding. That's been defunct since the early-90's, opening up the crossing for relatively affordable elimination.
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Old 11-07-2018, 01:06 PM   #2885
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Re: Green Line Extension to Medford & Union Sq

What would the case be for 2 stops between Union Sq and Porter Sq?

Particularly in a future of barrier-free toll collection and all door boarding on long Type 10s?

One centrally-located stop with good pedestrian-ramp access from either end of the platform (eg ramps from the Sacramento St underpass (and maybe a new Kent St underpass) and ramps to Park St at grade or an overpass) should get you great neighborhood-walk access (and I'm assuming that bus connections & kiss and ride are focused at Porter & Union)
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Old 11-07-2018, 02:29 PM   #2886
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Re: Green Line Extension to Medford & Union Sq

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Originally Posted by Arlington View Post
What would the case be for 2 stops between Union Sq and Porter Sq?

Particularly in a future of barrier-free toll collection and all door boarding on long Type 10s?

One centrally-located stop with good pedestrian-ramp access from either end of the platform (eg ramps from the Sacramento St underpass (and maybe a new Kent St underpass) and ramps to Park St at grade or an overpass) should get you great neighborhood-walk access (and I'm assuming that bus connections & kiss and ride are focused at Porter & Union)

Single stop at Conway is the bare minimum because the distance from Union to Porter is far too great for effective stop spacing. The case for 2 stops is that spacing is still a tad over-long and that a corridor that dense can easily support another. Wilson Sq. ends up being both a match for average spacing and a catchment spike because of the Elm intersection.



Since these are not down in a deep pit like the other GLX stops the cost difference for 1 vs. 2 intermediates isn't that great. So if cost isn't an overriding factor, hedge on 2 spacers because of the more ideal fit for the corridor's characteristics. If for no other reason than it makes redrawing bus routes easier to have the main Som. Ave. drag adequately covered by decent-ish LRT spacing; there are multimodal coattails in terms of degree of bus route double-up required with some stop spacings vs. others.
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Old 12-07-2018, 03:07 PM   #2887
Ruairi
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Re: Green Line Extension to Medford & Union Sq

Preliminary station designs
https://www.facebook.com/pg/MBTA-Gre...v&__tn__=-UK-R
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Old 12-07-2018, 07:05 PM   #2888
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Re: Green Line Extension to Medford & Union Sq

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Man those are ugly.
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Old 12-07-2018, 09:55 PM   #2889
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Re: Green Line Extension to Medford & Union Sq

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Man those are ugly.
I'm more puzzled about some other design choices rather than their aesthetics.

I'm guessing two separate internal teams designed the stairs and the platforms and neither of them have talked to the other at all yet.

Because I can't think of any other reason that you'd build a covered set of stairs, a covered platform, and have what looks to be about a 10ft uncovered gap between the two for seemingly no reason. If they're going to be 100ft apart, maybe I can buy that it's not worth the expense. If they're going to be that close, it's just sloppy design. Connect them and give the riders a continuous stretch of roofing.


It's really clear in that second Gilman Square (station south headhouse) render, but looking at the overheads it might exist at some of the other stops too.

Hopefully something to be changed as the design progresses.

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