Crazy Transit Pitches

No this was a separate proposal from the 1940s where the Green Line would be converted to heavy rail and connected to the Blue Line. I forget where it would have run out to and on which line but when Kenmore Sq station and the Huntington Ave Subway were both built they were built to be converted to heavy rail later on.

Edit: Ok so I read the section in question and it seems this is actually from the early 1970s when the MBTA was brand new. Still, this proposal is probably a hold over from the MTA plan from 1945.

If you keep on digging you get to the PMT 1978 plan which includes such plans as the Green Line D-E Brookline Village Connector. Interestingly, much of the other plans for expansion were carried out (Red Line extensions, Orange Line extensions, Green Line extensions). The Blue Line still gets no love!
 
No this was a separate proposal from the 1940s where the Green Line would be converted to heavy rail and connected to the Blue Line. I forget where it would have run out to and on which line but when Kenmore Sq station and the Huntington Ave Subway were both built they were built to be converted to heavy rail later on.

Edit: Ok so I read the section in question and it seems this is actually from the early 1970s when the MBTA was brand new. Still, this proposal is probably a hold over from the MTA plan from 1945.

If you keep on digging you get to the PMT 1978 plan which includes such plans as the Green Line D-E Brookline Village Connector. Interestingly, much of the other plans for expansion were carried out (Red Line extensions, Orange Line extensions, Green Line extensions). The Blue Line still gets no love!

Re-microwaved proposal from the 1945 BTC map. The pre- Mass Pike plan for a rapid transit line to Riverside along the B&A would've been HRT with some radical surgery on the Central Subway at Park and Boylston to turn them into HRT + LRT superstations. The D was always going to be trolley; Riverside was just a superstation where both modes met on separate flanks. This downtown surgery (which presumably they figured they could get away with because urban renewal was right around the corner and would've cleanroomed all the building impacts) would've accommodated both modes side-by-side somehow. Although they didn't really napkin-sketch it out.

The 1970's proposals (obviously without the B&A option) might've provided some basic descriptions on what the possibilities were, but it never got studied out in any halway-useful detail.


There wasn't a whole lot of push for full-on conversion of the Green Line to HRT after the early-1930's. The reason BERy was provisioning for that was because the railroads were at their absolute peak prowess in the 1910's and 20's. They had bought the NYNH&H's very minor Shawmut and Mattapan branches for the Red Line extension south of Andrew, but figured that was all they were gonna get because every other desirable rapid transit expansion corridor was along an overstuffed RR mainline making some monopolist money hand-over-fist. They figured that closely-paralleling subways and Els were the only way to get where they needed to go. Hence, the Everett extension of the Orange Line being put on-alignment for an El of Main St. Malden instead of along the Western Route tracks. And Kenmore being provisioned for a subway extension up the A Line alignment and North Beacon, paralleling the B&A a couple blocks south.

Once the Depression hit and the profit party was over for the railroads, it was a moot point. The financial weaklings like the Boston, Revere Beach & Lynn (Blue Line) were imploding to abandonment. Load relief lines like the Highland Branch, Needham Branch, and West Roxbury-Islington (half- Orange candidate, half- paved-over for Route 1) were easy buy-low opportunities. And the RR's started converting their 4+ track mainlines to bi-directional signaling so they could deal with the cash crunch and wartime steel shortage on 2 tracks instead of 4...which made the B&A, NEC, Western Route, Old Colony, Lowell Line, and Revere/Lynn part of the Eastern Route fungible co-tenant opportunities.

So even if the non-reservation surface streetcar routes were all eventually doomed, once they had choices in the matter for RR ROW's the Green Line was too ham-fisted a retrofit to bother radically rebooting. It probably would've evolved exactly how it did when the D opened: as a modern interurban with just a couple legacy reservation branches too high-traffic to get rid of, not as a full-blown metro. It would've gone to Woburn like on the 1945 map and they would've aggressively purged the E past Northeastern and maybe the B between Packards and Chestnut Hill Ave. in lieu of just C to BC and an A truncated at Union Sq. But otherwise, pretty much what we've got now + GLX Medford.
 
So West Medford is a major problem to increasing service on the Lowell Line - eventually you start getting enough Lowell locals and Haverhill expresses and Downeasters and maybe NH service that 60 will be a constant mess.

I think if a solution needs bulldozers, folks will insist on a Waverly-style underpass/tunnel.

The MBTA owns a lot of land in W.Medford: a full 4-track ROW and then much wider as you go North: the whole empty lot...13 acres...on the west side all the way up to Grove St/Saltonstall), so I'd play around with things that'd let trains clear the Rt 60 intersection faster/easer and let the gates pop up after any train passes.

Any of these might work:
1) Move the inbound platform to the South side of Rt 60 (between High and Canal). Inbound/Southbound trains would then stop after they cleared Rt 60 (Canal St would have to keep its gates down). Trains doing their "dwell" would never again leave their rear-end or nose hanging into Rt 60.

-or-
2) Create a 3-track setup starting at Canal Street all the way to Grove St (about 1 mile) and a new station about 500' north of the current site. Center track would be for "Express" and "Freight Clearance" use, with high level side platforms for DMUs and any local CR stops. This would at least ensure that outbound trains clear High Street on every stop (pleasing motorists), and might mean that the gates wouldn't have to close until any inbound DMU is revving up to cross. 3-track might also mean that trains that arent' stopping at W. Med could do ~20mph or more (I forget what the deal is) as they operate through

2a) keep the 3 track going further north, and get a higher-capacity and bike-ped friendly bridge at Saltonstall/Grove/Bussell.

3) Fully split the station with outbound high levels on the north side, inbound high levels on the south side, and some provision for freight clearance (a crossover switch? a gauntlet track? retractable platform edges?). High level boarding would shorten dwells and therefore shorten the "gates down" time of all stops.
 
No this was a separate proposal from the 1940s where the Green Line would be converted to heavy rail and connected to the Blue Line.

The whole Back Bay's ground-water-and-foundation status is sooo shaky, I can't see anyone ever doing anything in a tunnel anywhere on the Boston side of the Charles.

Meanwhile the fabricate-and-sink-in-a-trench method of building tunnel has gotten so clean.

I'd just send the Blue out across the Charles (from MGH) in a sunken tunnel, have it touch land for a station & vent structure at Memorial@Mass, and have it cut back across the Charles to land at Kenmore and do the D-under Kenmore connection there.
 
I'd just send the Blue out across the Charles (from MGH) in a sunken tunnel, have it touch land for a station & vent structure at Memorial@Mass, and have it cut back across the Charles to land at Kenmore and do the D-under Kenmore connection there.

Does that solve any acute transit issues though? Just because it might be an easier way to build doesn't mean it would be worth building. Though you do bring up a good argument about ground water. How far down would a TBM need to go to make that a moot issue?
 
If its on the Charles side of the Beacon St seawall there shouldn't be many issues. A lot of projects for recharging groundwater with roof runoff have been installed over the past few years too, so the falling groundwater issue isn't a bad a it was.

Remember the bottom of the Charles is laden with all kinds of toxic sludge, which shouldn't be stirred up. Because of this, dredging to sink a tunnel its probably out.
 
I think if a solution needs bulldozers, folks will insist on a Waverly-style underpass/tunnel.

The MBTA owns a lot of land in W.Medford: a full 4-track ROW and then much wider as you go North: the whole empty lot...13 acres...on the west side all the way up to Grove St/Saltonstall), so I'd play around with things that'd let trains clear the Rt 60 intersection faster/easer and let the gates pop up after any train passes.

Any of these might work:
1) Move the inbound platform to the South side of Rt 60 (between High and Canal). Inbound/Southbound trains would then stop after they cleared Rt 60 (Canal St would have to keep its gates down). Trains doing their "dwell" would never again leave their rear-end or nose hanging into Rt 60.

Bad idea. The 95 and 326 stop at West Med is on Playstead Rd. @ Irving St. across the street from the current platforms. You'd be losing some bus accessibility flipping a platform to the other side because those 2 routes turn towards Medford Sq. and there isn't a traffic light at the Playstead intersection. Also isn't nearly as much platform space to be had on the other side of the crossing behind buildings vs. behind the Rite Aid parking lot and the grass strip along Playstead.

2) Create a 3-track setup starting at Canal Street all the way to Grove St (about 1 mile) and a new station about 500' north of the current site. Center track would be for "Express" and "Freight Clearance" use, with high level side platforms for DMUs and any local CR stops. This would at least ensure that outbound trains clear High Street on every stop (pleasing motorists), and might mean that the gates wouldn't have to close until any inbound DMU is revving up to cross. 3-track might also mean that trains that arent' stopping at W. Med could do ~20mph or more (I forget what the deal is) as they operate through
Now this will work. Passing track is the only practical way you can get full-high platforms on a clearance route. Ample room for it if the center track forks out immediately after the Canal St. crossing. Though they really might want to think about busting up the Rite Aid, spread out the platforms a little, and open up an adjacent kiss-and-ride. Since the station's at a grade crossing there'd have to be ramps up from Route 60, which'll set the platforms back about 1 locomotive's length. For full-regulation 800-footers that would take max-size Lowell and Haverhill trains it would stretch back to about the Playstead/Madison intersection. So outbound-side path link-up to the park is recommended as is a real inbound-side sidewalk off the rear of the Rite Aid driveway to Johnson Ave./Tyler Ave.

2a) keep the 3 track going further north, and get a higher-capacity and bike-ped friendly bridge at Saltonstall/Grove/Bussell.
Don't need it. The bridge was rebuilt in '96 as an ultra-wide for 3 tracks. Why it was built with only one sidewalk I do not know. You don't need that long a siding anyway. Canal to the end of the MOW siding across from the Park is almost a half-mile long. Pan Am doesn't run any freights to Boston that reach that kind of length.

3) Fully split the station with outbound high levels on the north side, inbound high levels on the south side, and some provision for freight clearance (a crossover switch? a gauntlet track? retractable platform edges?). High level boarding would shorten dwells and therefore shorten the "gates down" time of all stops.
As with #1, bad idea for space and bus access. And overthinking it on the freights when #2 is just spiffy and gets you full-highs with a passing opportunity for an express or Downeaster.

Gauntlets are a really bad idea unless you absolutely have to squeeze past at a station where there's zilch for room. Slow zone, maintenance intensive, and higher-than-average derailment risk (which is doubly risky in the middle of a station with passengers on the platform). So gauntlets are one of those bullets you ration for that one station where you're absolutely stuck. It's not a solution for doing every station on a line. NJ Transit I think has got the only commuter rail gauntlets in the northeast at 2 consecutive stations on the Raritan Valley Line that overlap 5 miles of one of the busiest freight mains on the eastern seaboard before the freights peel out. And those are built around island platforms so if the freight derails and tips over it falls away from the ROW, not crushing someone on the opposite platform.


You can't do retractible edges on a multi-car full-high. The shocks on an oversize freight car laterally move too much to clear it. The one-car retractable mini-highs currently in use on the other Lowell intermediates (pic here of Wedgemere's new one in the retracted position) can skirt it because if they get smacked it's usually only by 1 extra-bouncy car and not every car on the train swaying in harmonic motion. But even the one-car retractible edge mini-highs get the snot kicked out of them by the big-ass intermodal trains that run 24/7 on the outer Worcester and Fitchburg Lines. CSX and Norfolk Southern kick in some maint spare change because the edges have to be replaced so often. Lowell isn't nearly as bad as the two giant freight mains because it's a pu-pu platter of light/midsize loads only a few times a day, but that mini-high construction exemption exists for very good reason. They'd be out there repairing busted edges 3 times a week if those were full-highs, and that's beyond reason for the freight carriers to pay up when the mini-high exemption is there to cover that liability.

It's actually not the car's raw width that's the problem with "wide" clearances because every freight car in North America is capped at 10'8" width, well within clearance of a full-high. It's the length and height of the car, and how much more oversize cars are allowed to laterally move, that makes them not fit. Longer cars have axles with wider turning radius and taller cars have extra give for tilting on curves, and because of that the shocks on each are built with a little more tolerance for lateral sway. You could inch an autorack through a 100% tangent high platform just fine if you really wanted to. At 2 MPH. Do it at 10 MPH--much less the 40 or 60 MPH top track speed freights can go on respective 60 or 80 MPH passenger track--and you're tearing off a chunk of platform edge and/or derailing the car.
 
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In Re: W. Med as choke point on Lowell Line.

Its good to know they could 3 track it for a mile or more (based on clearance under the Grove St Bridge). I'm happy to have the idea of a center clearance-express track and full highs on the side confirmed as workable. That, and about $2m worth of quad gates, and swag another $1m for short, smart signal blocks that'd let them go down "late" and spring up "early" and it seems it'd be ready for 2024 DMUs and twenty years of growth beyond, and keep avoiding the disruption of tunnelling.

Add a pedestrian outrigger on the upstream/Boston Ave side of the Mystic River Bridge and let folks walk to the GLX MVP/Rt16/UHaul "Phase 5" terminus

Then I'm wondering if that's as far "out" as the full-highs get on the DMUs. West Medford *is* a natural DMU stop: semi-dense, walkable, Zone 1A, CR Stop, and having the 94, 95, & 326 (rush-only express to Haymarket).

So West Medford seems "worth it", and able to accommodate transit growth through infill, modal choice, and connecting bus.

Then how about Wedgemere and Winchester Center? Back to 2 track and low platform, before terminating at Anderson at High Levels?

or wehther
 
If its on the Charles side of the Beacon St seawall there shouldn't be many issues. A lot of projects for recharging groundwater with roof runoff have been installed over the past few years too, so the falling groundwater issue isn't a bad a it was.

Remember the bottom of the Charles is laden with all kinds of toxic sludge, which shouldn't be stirred up. Because of this, dredging to sink a tunnel its probably out.

The groundwater issue in Back Bay (Beacon side of the seawall) is only resolved, if you don't start pumping it all out again.

This means that any tunneling in Back Bay (or most of the South End) need to be truly watertight, and not the open sieves that have been built in the past. You could quickly undo all the good work that groundwater recharge is trying to do. Tunnels need to be treated as underwater tunnels, not dry land tunnels with massive pumps for infiltration removal (which pumps away all the local ground water).
 
Tunnels need to be treated as underwater tunnels, not dry land tunnels with massive pumps for infiltration removal (which pumps away all the local ground water).

That's my interpretation. Tunneling through Back Bay incurs all the worst costs: subsidence, foundation, infiltration, NIMBYs. If you have to build an underwater tunnel, its way cheaper to actually build it under water, where there are no abutters.

Recall that even putting a small new entrance on the Copley station caused all kinds of trouble for the Old South Church. Back Bay needs to get its act together before its soil liquifies in the next earthquake from New Madrid or Cape Ann ('course if it doesn't, they'll be able to be able to cut-and-cover a tunnel through the rubble)
 
In Re: W. Med as choke point on Lowell Line.

Its good to know they could 3 track it for a mile or more (based on clearance under the Grove St Bridge). I'm happy to have the idea of a center clearance-express track and full highs on the side confirmed as workable. That, and about $2m worth of quad gates, and swag another $1m for short, smart signal blocks that'd let them go down "late" and spring up "early" and it seems it'd be ready for 2024 DMUs and twenty years of growth beyond, and keep avoiding the disruption of tunnelling.

Add a pedestrian outrigger on the upstream/Boston Ave side of the Mystic River Bridge and let folks walk to the GLX MVP/Rt16/UHaul "Phase 5" terminus

Then I'm wondering if that's as far "out" as the full-highs get on the DMUs. West Medford *is* a natural DMU stop: semi-dense, walkable, Zone 1A, CR Stop, and having the 94, 95, & 326 (rush-only express to Haymarket).

So West Medford seems "worth it", and able to accommodate transit growth through infill, modal choice, and connecting bus.

Then how about Wedgemere and Winchester Center? Back to 2 track and low platform, before terminating at Anderson at High Levels?

or wehther

Wedgemere would have to get its platforms moved off the overpass to be able to do a passing track. But given that you can literally see the Winch. Ctr. platforms from the edge of the Wedgemere platforms and it's a trivia answer for one of two of the closest-proximity railroad stations in North America...that station probably shouldn't exist at all on DMU's either, let alone get rebuilt. It's got the mini-high. Short of fixing stuff when it crumbles that's the last upgrade it should ever get.

Winch Ctr. must be mini-high because it's up on a 2-track viaduct sandwiched by buildings and the street grid. And it's too dangerous up there for a gauntlet with the side platforms and the long drop to the street if a freight car derails and tips over. That was a mid-1950's grade crossing elimination when the area was already built up, so they used what little space was available. (Can see the construction in-progress with temp tracks at-grade on Historic Aerials' 1955 view...prior to that the tracks used to split the rotary down the middle). It'll never be anything different, and were you to someday build rapid transit out here you're probably going to have to do a little 1000 ft. shallow-dig subway under the Laraway Rd. and Shore Rd. parking lots popping back up on either side of the viaduct, and subway station with underground platforms right under the rotary.


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Honestly, Lowell DMU's got some pretty awkward station issues. There's Wedgemere's spacing and the all-around uselessness of spending good money on something that duplicate. There's s Mishawum's spacing + absolutely nonexistent ridership that no amount of service frequency is going to rescue. There's the egregious 4-mile station gap that skips all of populated Woburn. Downtown Woburn hasn't had bus, bike, walking or trivial car drive access to a commuter rail station since the Woburn Branch was abandoned 33 years ago. There is no way the T can afford that sorely-needed infill at Montvale Ave. or Salem St. by 2024; no such proposal exists except for the town slamming its head against a wall saying "NO! Don't dump more money into Mishawum! Give us something after 3-1/2 decades in the wilderness."

And then there's the fact that Anderson is a parking sink with no local bus connections and not so much as a station entrance on the New Boston St. side of the tracks, cutting it totally off from the rest of Woburn's population center along Route 38 north of 128. Anderson hasn't got an off-peak anchor. It'll do fabulously well at rush hour and when there's a game or big event in town, but without connectivity it's just going to be full of cars and devoid of people in the midday. Given that the due-north service area got its buses chopped the hardest in the last round of service cuts, what are the odds they're going to introduce new routes out there?



We've got enough problems trying to figure out if they're even going to pull off DMU's anywhere but Fairmount and the South Station-West dinky. I think Lowell, for all its unused track capacity and attractive-seeming stop selection, can be better-served by other means.

This is what I'd do.


#1 - Institute a "94A" bus, Davis Sq.--College Ave.--West Med--Winch Ctr.

-- Follow the routes of the 94 to West Med, the 95 from West Med up Playstead to Main, and the 134 up Main to Winch Ctr. The stop at the Main/Bacon St. rotary is 1300 ft. from the Wedgemere station entrance. If that's not good enough, run it up Bacon and Mystic Valley Pkwy. across the damn street from Wedgemere. Rapid transit transfers at Red/Davis and GLX/College Ave.

-- 15 minute peak frequencies, 25 off-peak. The present-day 94 is about 20 on-peak, 30 off-peak...not a dramatic change.

-- Current travel times on these buses are 8 mins. Davis to West Med, 5 mins. West Med to Playstead/Main, 5 mins. Playstead/Main to Winch Ctr. So that's 18 minutes to ping between 3 commuter rail stops and 2 different rapid transit lines. Vs. 20 minutes for Winchester-North Station on the train at same headway. Dead-heat frequency, dead-heat travel time to rapid transit.

-- Bus + subway fare < Indigo + subway fare on the transfers. Red > Orange for the non-Green transfer option. And off-peak transit from Medford and Winchester is going to be more locally oriented to short trips to Cambridge and Somerville vs. commute trips to the CBD. So I think these 3 advantages together offset 90% of the 'uniqueness' of the DMU service. And, depending on how you rate the Somerville/Cambridge/Red access upside comparatively vs. North Station...is maybe the better all-day service period.

-- This "94A" has enough going for it to be must-have the second GLX College Ave. opens. And if that's 2020 (or '22...*cough*) and Lowell is on the backside of the DMU rollout in 2024 (or '26) there may not be anything to debate here because the bus will have grabbed the reins and the ridership first. DMU or no DMU, I think this is essential enough to have that it won't be an either/or question. It'll be an "is there room for each to carve out its own independent demand profile?" I don't know the answer to that.

-- If there isn't a solution to the Woburn inaccessibility or the Anderson non-connectivity...it's too early to be reaching past Winch Ctr. Fix Woburn first and get a complete corridor before going Indigo. If this bus solution serves the density at the first 3 stops adequately in near-immediate fashion, focus the station investment on the Woburn infill and getting bread-and-butter bus and ped connections to Anderson. Then implement Indigo. If there's still enough leftover demand on the whole corridor.



#2 - Move all thru Haverhill service back to Lowell. Boost Reading with the vacated slots.

-- Right now it's ~24 daily Lowell round trips at the non-Mishawum stops (23 IB, 26 OB mismatch). Thru Haverhill trains are 13 round trips cumulative on the Western Route locals and Anderson expresses. Lowell has no layover yard whatsoever, so those frequencies will increase dramatically if/when Nashua happens and they rent layover space in the adjacent freight yard. Haverhill's double-track project isn't done yet and Bradford layover is tapped out of space. The latest presentation to the ungrateful Plaistow NIMBY's offered an escape for the layover hostage-taking by decoupling the layover from the station site. One of the layover options is literally 20 ft. across the MA side of the state line. And if the T has to go it alone, they're prepared to purchase that industrial parcel, move out of Bradford, increase Haverhill frequencies, and not care if those clowns across the border ever get their station.

-- Figure a total relocation = minimum 40 daily round trips most stops to Anderson, and probably 10 expresses that skip straight to Anderson. Right now Salem and Beverly are the king at 30 round trips per day, and Route 128 has only 28. That's a lot of trains.

-- Lowell has some of the highest potential on the system for decent off-peak ridership with better headways, so those hourlies should slim down to 45-50 mins. except late nights when hourly is fine. Haverhill has a schizo off-peak right now because of all the freight congestion on single track...90-150 mins. That stops soon and they can at least hit a consistent 90 mins. Not sure how much demand there is for hourly, but 80 mins. sounds like a good target. Average these together and you get headways varying from 30-45. Not clock-facing, but 80% of the way there.

-- Haverhill trades down from 7 intermediate stops on slow track to Reading track to 5 on the fast Lowell Line + maybe that merciful Woburn infill. Any super-expresses let's chalk up to above-and-beyond schedules from the capacity increases. So that's 40+ round trips stopping at Winchester, merciful Woburn infill, Anderson, and Wilmington. West Med you can throttle back to whatever best fits the crossing gates...but it can probably handle most of it. Wedgemere is a sometimes-skip. And Mishawum dies the death it should've 20 years and millions in sunk cost ago.




I don't know about you, but that tag team seems like 90% or better of what an Indigo-ed Lowell would serve, and doesn't cost nearly as much as a funding dump for level boarding at low-upside stops like Wedgemere while continuing to defer a Woburn stop, continuing to defer the missing Yellow Line feeders to Anderson, and continuing to believe Mishawum can be reinvented for a 4th time if we only spent more money on it. I know this is Crazy Transit Pitches, but we've got so many Indigo-colored question marks on every line they want to do that on I wouldn't let perfect become the enemy of good here. Lowell is #1 with a bullet where rejiggered existing service can backstop nearly all of it and ration more resources to the other lines they committed to. Deal with DMU's to Anderson in 2030; focus on salvaging the 2024 target for the others first.
 
No this was a separate proposal from the 1940s where the Green Line would be converted to heavy rail and connected to the Blue Line. I forget where it would have run out to and on which line but when Kenmore Sq station and the Huntington Ave Subway were both built they were built to be converted to heavy rail later on.

Edit: Ok so I read the section in question and it seems this is actually from the early 1970s when the MBTA was brand new. Still, this proposal is probably a hold over from the MTA plan from 1945.

If you keep on digging you get to the PMT 1978 plan which includes such plans as the Green Line D-E Brookline Village Connector. Interestingly, much of the other plans for expansion were carried out (Red Line extensions, Orange Line extensions, Green Line extensions). The Blue Line still gets no love!

The idea of converting the Green Line subway to high-platform operation is something that was strongly considered again after the opening of the Riverside Line in 1959.

The M.T.A.’s final annual report issued in 1963:
https://archive.org/details/annualreportofbo1963metr
includes a 10-year expansion plan on page 13, that includes the following:

“The ten-year plan, as outlined at the Citizens' Seminar, also called for extension of the Huntington Avenue subway to a point opposite the Museum of Fine Arts. This extension, it was pointed out, would enable the city to re-develop a section of Huntington Avenue, opening it up to additional vehicular traffic lanes.

Within the ten-year period, the Commonwealth Avenue subway would be extended to a point easterly of the Cottage Farm Bridge. Both the Huntington Avenue and Commonwealth Avenue extensions would provide for bus service beyond the proposed points of the subway extensions.

The Seminar audience also heard a call for conversion of the Highland Branch to true rapid transit operation with heavy rapid transit trains, using the Boston & Albany main line tracks from the Highland Branch near Beacon Street, to Back Bay Station connecting with the proposed extension of the Washington Street Tunnel on the Boston- Providence Railroad. One major transportation bonus to be gained from this conversion would be the relief of congestion in the Boylston and Tremont Street Subway system. In this connection, the Seminar audience was warned that with the completion of construction of the Prudential and Government Center developments, the trolley car subways will be unable to cope with rush hour loads.”

End of quoted section

Around that time the MTA’s vehicle engineering department actually came up with a design for a “Highland Branch” high-platform car for use on these converted lines. A friend of mine has a copy of the initial engineering diagram for the car. It looked like a cross between a 1951 Blue Line car and a 1964 NYCTA R-32, basically a small fluted stainless –steel car with a pantograph.

The reroute of the Green Line subway at Government Center in 1963 also included support columns placed in such a way that it would not prevent the conversion of the then new Lechmere-bound platform to a two-direction island platform, with the Brattle Loop track converted to a westbound track that would cut across part of the platform space and continue toward Park St. (the existing westbound track and platform between Haymarket and Government Center would presumably have been abandoned). They also moved one of the stair cases at Government Center that connects the Green Line level to the Blue Line level to a location closer to the Lechmere-bound platform, which would indeed clear it from the path of the Brattle-loop track instead continuing west as a main-line track.

The Central Area Systems Study from 1971:
https://archive.org/details/centralareasyste01mass
moved away from the idea of converting the Green Line to high-platform, and set forth the philosophy of updating the Green Line for continued use with low-platform light-rail cars.

Some key comments from the introduction of that document:

Summary and recommendations (many of which should sound very familiar):
“The following pages summarize the results of the Central Area Systems Study (CASS) project. This major study project was conducted by the Authority's Planning and Development Department, with Federal aid to the extent of 2/3 of the cost, in the form of Technical Study Grants from the Urban Mass Transportation Administration.

The CASS research has developed a course of action for the Authority to follow in modernizing its vital Green Line (streetcar system) . The study was expanded to cover the Blue Line (East Boston rapid transit line) , and recommendations for modernizing and extending that line are also included.
The central conclusion of the CASS project is that the Green Line will serve the public best by retaining its present type of low-platform "streetcar type" service, and that this service can be expanded and modernized, with adequate capacity to meet the needs of the metropolitan community at least until 1990. This can also be accomplished at far less cost than would be incurred if part or all of the Green Line were converted to high-platform type rapid transit service.

The physical condition and performance of the Green Line, and especially the PCC type streetcars currently in use, are such that the highest priority should be assigned to implementation of the following recommended program, known as the "Stage I Program":

-Acquire 220 new air-conditioned "Light Rail" surface-subway cars as described in Chapter 10, to replace the entire fleet of PCC cars. (The quantity of 220 cars was based upon certain assumptions as to size, configuration, and performance characteristics of the cars, as well as a hypothetical schedule. It also assumes that streetcar operation on the outer portion of the Huntington Avenue line would be discontinued in favor of buses. This quantity may be revised when more specific information becomes available.)

-Carry out major improvements to the Green Line power distribution system, including three new substations, new feeders, and improvements to the trolley system.

-Make track and roadway improvements on the Riverside Line, Central Subway, and Lechmere Viaduct. This program also includes installation of emergency crossovers, turnback facilities, and certain station improvements

-Equip the Highland Branch and the Central Subway with a cab signal system and automatic train stop protection.

-Other improvements in control and communication for the Green Line will include train radio communication, public address systems on trains and at stations, new inter lockings with automatic traffic control at principal junctions, and a system of automatic train identification with automatic destination signs at Central Subway station platforms.

-Make improvements in track, fencing, platforms, lighting and traffic control on the Beacon Street and Commonwealth Avenue Lines. Construct new passenger shelters at the principal stops.

-Widen the median strip on Huntington Avenue between the subway portal and Brigham Circle, (in conjunction with Boston's planned widening of the Avenue). Improvements will include new and wider loading platforms, relocation of the passing track at Northeastern University, fencing,
lighting, traffic signals, and a reduced number of motor vehicle crossings. Construct new turnback facilities between Brigham Circle and Heath Street. Acquire 22 new air-conditioned buses to replace streetcars on the outer portions of the line, which presently operates directly in the narrow and congested streets.

-Construct a new vehicle maintenance facility at the Riverside terminal. This facility would be capable of carrying out major repairs and overhaul of the entire Green Line fleet.

-Modernize the Reservoir Car House to provide for efficient routine inspection, cleaning, and light repairs for a portion of the Green Line fleet.””
(end of quoted section)


Except for installing cab-signals with automatic stop protection, almost every one of the recommendations were implemented, including the conversion of the Arborway Line beyond Heath St. to “air –conditioned buses”

The study also included this interesting summary of the Green Line and of the issue of converting some or all to high-platform:



"The Green Line "organism" can be broken down into component parts with different functions:

Commonwealth Avenue and Beacon Street surface lines are local collector lines, serving a densely populated linear residential area, whose residents are downtown oriented, and heavily dependent on public transportation.

The Huntington Avenue surface line is really an extension of a downtown distribution system, serving an area of intense educational, medical, and cultural activity. The outer end of this line (beyond Heath Street) is like a separate line, serving as a local collector, but doing a poor job because of severe street congestion in the portion where the streetcars do not have the benefit of a reservation.

The Riverside Line (or Highland Branch) is inherently a high-speed commuter trunk line, trying to do the job with low- speed equipment. It is entirely grade- separated, and is the longest line on the MBTA system (9.4 miles from the subway portal) and the only one which extends to the circumferential highway, Route 128.

The Central Subway serves all four surface lines, and gives them the great advantage of offering a one-seat ride to downtown (without transfer) , and distribution through the spine of the Central Area, and to the other three rapid transit lines which it intercepts. Besides this, the Central Subway performs a vital shuttle service for intradowntown area riders.

The Lechmere Line is really an extension of the Central Subway, serving as a feeder, but due to its short length it depends heavily on feeder bus routes for its existence.

Many people today think of the "trolley car" (a surface rail car designed for low-level platforms) as obsolete and old fashioned; and so it is, wherever it has to operate in the streets and mingle with motor vehicle traffic; but in Boston, with its unusual system of surface lines in reservations, feeding directly into a subway, the "streetcar" is potentially a far more versatile vehicle than the "conventional" rapid transit
car.

Conventional rapid transit lines are thought to be more efficient and less costly to operate than low-platform car lines. This is true if one considers only the cost of operating the line itself, and if peak volumes are high. But here in Boston, peak volumes are not very high (as compared to cities like New
York and Chicago) . Peak loads are being handled with 4-car trains on the rapid transit lines. Work rules and state crew laws tend to defeat much of the inherent advantage of high-platform rapid transit. But more important is the fact that the three rapid transit lines (Red, Orange and Blue) depend heavily on costly and money-losing feeder bus lines for their life-blood, whereas the Green Line performs most of its own collection and distribution service. Moreover, the three rapid transit lines are highly dependent on the Green Line's Central Subway for downtown distribution, and to areas in Back Bay, Brookline, Brighton and the Fenway
.
In terms of the number of people served, the Green Line's Beacon Street, Commonwealth Avenue, and Huntington Avenue operations are far more important than the much longer Riverside Line.

The CASS traffic studies have shown that conversion of the Riverside Line to high-platform, high speed operation would attract a great deal more traffic by 1990. Connecting the Riverside Line to the Blue Line, creating a through route from Riverside to Wonderland, would attract even more riders, and
give the Blue Line much better downtown distribution. But engineering studies have shown that there is no easy way to convert the Riverside Line without disrupting the very vital ridership patterns that now exist, and running the risk of a major loss of local riders.

Conversion of the Riverside Line to high-platform rapid transit operation is a problem that goes far beyond the purchase of new cars, and raising the platforms at stations. Conversion of this line would require either rerouting the downtown portion to remove it from the Central Subway and separate it from the rest of the Green Line, or conversion of the entire Central Subway
to high-platform operation. The latter choice would mean cutting off the Commonwealth Avenue, Beacon Street, and Huntington Avenue lines, forcing transfers to the Central Subway unless the Light Rail vehicles were operated with dual-level platform capability. It would not be feasible (or even desirable) to convert these surface lines to "pure" high-platform operation.

Rerouting of the Riverside Line could be done in two different ways, but either one has serious disadvantages. The capital cost of any of the choices would be extremely high, and would primarily benefit the Riverside Line at the expense of other portions of the Green Line network.

As mentioned above, a tunnel connection between the Riverside Line and the Blue Line was considered, but this would have required conversion to high-platforms, and a different system of power pick-up. In view of the high cost of such a connection, it was apparent that the benefits gained in better distribution within the Inner Cities Area, and inter-corridor riding, would be offset by the disadvantages and problems of conversion to high-platforms mentioned above.”
End of quoted section


As a side note, I think this study might b the earliest MBTA document I have come across that uses the term "light rail"
 
As I've often suspected:
“The ten-year plan, as outlined at the Citizens' Seminar, also called for extension of the Huntington Avenue subway to a point opposite the Museum of Fine Arts. This extension, it was pointed out, would enable the city to re-develop a section of Huntington Avenue, opening it up to additional vehicular traffic lanes.
My working hypothesis is that the purpose of the trolley tunnels in Boston has been largely about creating more space for private vehicles on the surface, not about creating better transit. That it may have improved streetcar operations was a bonus.

For improving transit there were at least two options: dedicating lanes on the surface and giving them absolute transit priority. Many cities in Europe did this, because it's considerably cheaper, and cost-effectiveness was a priority. Another option is what we did: digging very expensive tunnels. The cheap option takes space away from private vehicles; the expensive option gives even more space to private vehicles.
Make improvements in track, fencing, platforms, lighting and traffic control on the Beacon Street and Commonwealth Avenue Lines. Construct new passenger shelters at the principal stops.
And then we never implemented improved "traffic control" on any of the surface lines (or for that matter, much in the way of decent platforms). Because again, that wasn't the point. Signal priority for trolleys doesn't do anything for private vehicles, so the city has not really ever been interested in doing it. Until maybe recently.

Widen the median strip on Huntington Avenue between the subway portal and Brigham Circle, (in conjunction with Boston's planned widening of the Avenue)
So THAT's why Huntington Ave is so screwy. It's another victim of street widening, leaving behind three-foot-wide sidewalks in places. I have to do some more digging on this.

This is very interesting and perceptive:
Many people today think of the "trolley car" (a surface rail car designed for low-level platforms) as obsolete and old fashioned; and so it is, wherever it has to operate in the streets and mingle with motor vehicle traffic; but in Boston, with its unusual system of surface lines in reservations, feeding directly into a subway, the "streetcar" is potentially a far more versatile vehicle than the "conventional" rapid transit
car.

Conventional rapid transit lines are thought to be more efficient and less costly to operate than low-platform car lines. This is true if one considers only the cost of operating the line itself, and if peak volumes are high. But here in Boston, peak volumes are not very high (as compared to cities like New
York and Chicago) . Peak loads are being handled with 4-car trains on the rapid transit lines. Work rules and state crew laws tend to defeat much of the inherent advantage of high-platform rapid transit. But more important is the fact that the three rapid transit lines (Red, Orange and Blue) depend heavily on costly and money-losing feeder bus lines for their life-blood, whereas the Green Line performs most of its own collection and distribution service. Moreover, the three rapid transit lines are highly dependent on the Green Line's Central Subway for downtown distribution, and to areas in Back Bay, Brookline, Brighton and the Fenway
 
As I've often suspected:



So THAT's why Huntington Ave is so screwy. It's another victim of street widening, leaving behind three-foot-wide sidewalks in places. I have to do some more digging on this.

This is very interesting and perceptive:

They did widen the streetcar reservation during the 1980 reconstruction between Northeastern and Brigham Circle. Here is a link to a photo of the Brigham Circle platform in 1979
http://nycsubway.org.s3.amazonaws.com/images/i115000/img_115740.jpg
img_115740.jpg
 
Do you know when the sidewalks were cut down? It varies a bunch all over the place, but there's some spots near Brigham that are literally 3 feet. Also by Punter's, and further down as well.
 
Do you know when the sidewalks were cut down? It varies a bunch all over the place, but there's some spots near Brigham that are literally 3 feet. Also by Punter's, and further down as well.

The 1980 project was very extensive, streetcar reservation removed and rebuilt with more room at platforms, full roadway and sidewalk reconstruction. I don't know for sure though if the present configuration dates back to then. It would not predate 1980 though, as everything was touched at that time.
 

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