NYTIP – enhancing the nyc subway, part 4: eastern parkway

Welcome back to my ongoing series on the New York Transportation Improvement Plan (NYTIP)! In my last post, I discussed ways to improve the Broadway and Queens Boulevard lines. In this post, I will discuss the Eastern Parkway trunk line served by the 2, 3, 4, and 5 lines in Brooklyn.

NOTE: Click any image to enlarge.

[Fig. 1] Snippet of the NYC Subway Map showing the Eastern Pkwy trunk line and branches.

The Eastern Pkwy trunk line runs from Borough Hall to Crown Heights – Utica Avenue in Brooklyn. The 2 and 3 lines run local, while the 4 and 5 lines run express. West of Franklin Avenue station, the trunk is already “de-interlined” since 2 and 3 trains from Manhattan’s west side run local and 4 and 5 trains from Manhattan’s east side run express. East of Franklin Avenue station, the 2 and 5 diverge via the Nostrand Avenue branch, while the 3 and 4 continue via Eastern Pkwy; the 3 runs local to New Lots Avenue, while the 4 runs express to Utica Avenue.

The current pattern constrains capacity on the 2, 3, 4, and 5 lines due to a single junction – the notorious Rogers Avenue Junction (also called Nostrand Junction):

[Fig. 2] Nostrand Junction. Source: Regional Plan Association’s Save our Subways publication.

As originally designed, Nostrand Junction had local service splitting into two branches (one via Nostrand Avenue and one continuing east on Eastern Pkwy) and express service continuing via Eastern Pkwy to the Utica Avenue terminal. Under the current pattern, the 5 express crosses the local tracks at grade to access the Nostrand Avenue branch. Due to this merging conflict, as well as the inefficient design of the Flatbush Avenue – Brooklyn College terminal (which wasn’t intended as a terminal), several rush-hour 2, 4, and 5 trains start or end at Utica Avenue or New Lots Avenue. This causes even more conflicts.

The Regional Plan Association has the right idea when they suggest sending the 2/3 via Nostrand Avenue and the 4/5 via Eastern Pkwy, but there’s a problem – this pattern still requires either the 4 or the 5 to cross the local tracks to serve the local stops east of Franklin Avenue.

As such, NYTIP prescribes the following capital investment:

Rework Nostrand Junction to eliminate at-grade crossings.

The cheapest way to do this is to adopt RPA’s suggestion, which requires short track extensions as depicted in the figure below:

[Fig. 3] Reworked Nostrand Junction with new track segments. The original track map belongs to vanshnookenraggen.

With these short track segments, it is now possible to fully de-interline Eastern Pkwy without merging conflicts. NYTIP recommends RPA’s suggestion – 2/3 via Nostrand Avenue, 4/5 via Eastern Pkwy – and implements it as follows:

Swap the 3 and 5 lines east of Franklin Avenue.

[Fig. 4] Overview of the 3/5 swap, via Brand New Subway.

Through this swap, the 3 replaces the 5 to Flatbush Avenue – Brooklyn College, and the 5 replaces the 3 to New Lots Avenue. This allows for service increases on the 2, 3, 4, and 5 lines. While the Flatbush Avenue – Brooklyn College terminal limits capacity, this is solvable either by constructing tail tracks or extending the Nostrand Avenue branch. I’ll discuss the Nostrand Avenue branch extension in a future post.

In my next post, I’ll discuss the Bronx IRT – specifically, the 2, 4, and 5 lines. Until next time!

One thought on “NYTIP – enhancing the nyc subway, part 4: eastern parkway

  1. Good solution for Rogers Jct. The fact that so many are recognizing this problem, there is hope that the MTA can spend money on installing the additional switches needed.

    Overall, there should be many more 2 trains than 3 trains, since 2 trains reach the NE Bronx, and the 3 trains only reach two unique stations in Harlem.* So assuming that the majority of trains (but not all) along the 7 Ave IRT express can be turned at Flatbush Ave, all 2 trains should go to Flatbush Avenue. Furthermore, all trains that go to Flatbush Avenue should be 2 trains. The few additional trains that can’t fit at Flatbush Ave should be 3 trains to New Lots.

    2 train to Flatbush (including more 2 trains than currently assigned)
    3 train to New Lots
    4 train to New Lots (since 5 currently turns at South Ferry for good parts of the service day, it would be simpler if 4 ran the whole way at all times).
    5 train to Utica

    *Since there are only two unique stations, the 3 train should be a part-time train and the two northern stations should be part time and serviced by bus along Lenox Ave at all times other than rush hour.

    Like

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