u/name_is_temp

Im tired of typing, but this is my take on subway/rail expansion in the bronx.

It includes

-Pelham Pkwy Crosstown, Depending on de-interlining it might not be a 6th Av branch, It will be part Elevated, and part underground, and a yard could be built on parking lots at Bay Plaza.

-A 6 Train Extension into Co-op City. Sell explanatory, many people have push for it, this is my take on it which will run on Co-op City Blvd.

-3 Av replacement being an improved Metro North, specifically the Harlem line which will have fare integration.

-A Second Avenue extension to Throggs Neck, the line will run above Lafayette Av and the Cross Bronx Expway, and run under Spofford Av, Longwood Av, 161 St, Third Av, and Lincoln Av.

-A IBX Bronx extension which will not be on the Hells Gate Bridge, but on a parallel new bridge. It will only run directly next to the line when it reaches the Bronx, it will then run on the Port Morris Connection, until St. Mary's Park, where it will turn to run under 146 St, then up Brook Av until it meets with the Port Morris Connection, Then under 164 St (kinda), on the 9th Av Tunnel (if it is still there), then up the Hudson Line ROW.

Under EU pricing, it will cost $8B-$9B, Although we are not in the EU, so it will probably be a lot more. This will probably be enough for the Bronx for the next long time.

Other Small things are there, including a flyover junction at Mott Haven Junction, and Parkchester. There are also provisions set up for a possible 1 train extension, and a Second Avenue Branch to the Concourse Line.

Next is Should Queens or Manhattan be next?

PLS DON'T SLIME ME OUT IN THE COMMENTS, I'm from NY, I know little about how the underground works, but I do know is this is possible theoretically. Also this is a thought experiment, like I said Pls don't slime me out, your transit system is very different from ours 😭

I'm well aware of the signal differences between the lines that would have to be changed.

No, the Jubilee line does not run on the circle line, it branches under it. There is also dedicated platform for the Jubilee line of Blackfriars.

Since the line is very complex to extend north (kinda like the PATH in NYC) Why not add fill in stations, and prepare the line to extend south. The Piccadilly line could join it on the south-bound journey. But I have given the line its own platform at Waterloo, which can ultimately be changed to the Waterloo and City line platforms if it is to expensive. Where should this extend south (if it even should).

In the far future to boost service along Brighton, and to improve the alignment of the Franklin Shuttle, A Connection should be built into it (just 1). The Crosstown one is very popular and the cheapest, but maybe it could be a different line. Note that every connector except for the Crosstown Line uses a subway under Bedford Avenue between Franklin Avenue and the Bedford Avenue station, mimicking the (1929?) proposal to run a subway under Bedford Avenue. Which one do you think is the best?