|
|
| Re: IND Second system (1592671) | |||
 |
|||
| Home > SubChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: IND Second system |
|
|
Posted by Jackson Park B Train on Wed Dec 15 16:08:47 2021, in response to Re: IND Second system, posted by ntrainride on Wed Dec 15 09:47:45 2021. some corrections. When first opened, the bi-level tunnel in downtown Oakland had oly two tracks on the eastern side of the structure. Later the third track was laid in the upper level west side . It was that track which was operated bi-directionally in rush for several years. That operation has ceased many years ago.As to San Francisco, the upper level tunnel where SF Muni Metro LRVs operate was originally supposed to be a second BART route within SF and potentially beyond. At the Civic Center station, the west stairway was built to facilitate transfer between the two routes--now blocked by steel bars. One can also notice that Muni tracks are offset toward the extra long platforms as the tunnel was built for BARTcars in 10 car trains. As to other US cities w/multiple track ROW, the CTA north of the up ramp from the State Street Subway all the way to Howard Street, is four tracks. South of the subway ramp, that route was 4 to just north of Chicago Ave to allow greater throughput. Philadelphia's Broad Street line was build to be 4 tracks north of Spring Garden. See nycsubway.org for the history. One can consider the Metra Electric District, former Illinois Central Electric, was built w/ 4 tracks from Van Buren to 115th/Kensington, and 6 between 11th/Roosevelt Road to 53rd/Hyde Park, to allow hyper expresses (called 'Specials') on 4 of the 6 tracks. While nominally a mainline RR the Electric, as with most rapid transit, featured sliding doors controllable from any vestibule, (think IND triggers but inside) high level platforms, semi-barrier fare collection, In theory, BART was built as an "express only" route in the East Bay, but a classic subway within SF. FWIW, there has been recurrent talk of "infill stations" which staff has stonewalled by claiming immense costs. IMHO, for many years BART staff has denied it is a subway, preferring a comparison to the LIRR (from an interview decades ago of their PR guy, and repeated in his memoirts). More recently, some of the directors (entirely elected) speak of BART as a subway. |
|
|
|