It's always fascinating to me that NYC subways can be re-routed in any tunnel/can even be interlined. It must make running service so much easier.  I come from Boston where all the MBTA subway lines have different train sizes, platform heights and tunnel dimensions so each line is not compatible with other lines--cons of being the first Subway in USA.

I’m just here to see the comments

Seeing this recommended after the MTA is getting the ball rolling on swapping (F) and (M) and de-interlining Rogers Junction.

as an uptown native, the A train going local full time thru central park would piss me off beyond belief

This has to be one of your best viewpoints on deinterlining. I’m more open-minded to the potential IRT changes that have been used for decades

We seriously need to get you as head of the MTA's long term planning. Just throw you a couple billion a year to do projects like these...

The reason in my opinion, the system is set up in the current way, is because on either side of the Bronx you have an option to go to the east or west side of Manhattan. So it’s more about the options of getting into Manhattan rather than frequency on the line.

You would definitely need to expand 149 to make this work, like there needs to be 4 new staircases added from the lower platform directly to the upper platform. There is simply not enough space to make everyone transfer as the station is currently configured. I know you said you took a few trips on the line but as someone who takes it on a daily basis, every time the 5 has to be rerouted to 7th ave due to some issue on Lexington ave, there is a mass of people having to get off and take the 4 train upstairs, its barely possible to move. Now lets do that for every 5 train during rush hour, people would be fucking upset.

I think it's a bit ironic how the MTA uses their metrics to determine whether Dyre gets the 2 or 5. It really comes down to how many more riders travel between the Bronx and Brooklyn.

The argument is that Brooklyn riders tend to come from WPR, and as the 2 serves Brooklyn full-time, they send the 2 to Wakefield.

This is why on weekends when the Clark St Tubes are closed, not only do they send the 5 to Brooklyn, they swap the 2 and 5 in the Bronx. Operationally, it's more feasible to give the Brooklyn (dominant) line direct access to 239 St Yard.

Id be happy if the red line was red and the green line green

The only way to even get IRT deinterlining is to drastically upgrade the 149th grand concourse station capacity and add an infill station to the MNRR to allow access to the UWS from the regional upstate areas and CT served by metro north ohh and you won’t have to run riverdale express buses anymore either. Currently at best you can get away with reducing the bxm1 and dropping bxm18

Currently to get the 5 service to the Lexington line it has to go up the ridiculous loop tracks at 149 which must have some kind of capacity limiting factor.  It's an absolutely horrendous loop, almost impossible to safely perform maintenance on.

Y'all have transit?

Plenty of solid arguments here, leading me to pause and rewind, hope that helps your play time numbers - just one request: in the midst of all the route redesignations, there should be room to keep the 8Av service to JFK as the blue A, for the sake of repeat visitors to NYC \m/

As long as the 5 still exists in service, I'm perfectly fine with this plan.

In another timeline, 149 St-Grand Concourse is a massive cross-platform transfer where you can easily transfer between 4,5 and 2,3

As a Harlem born and raised, current NYC resident, who's lived in parts of Brooklyn and the Bronx, I always found the MTA subways to be very intriguing and amazing!

However, I appreciate the time, research, and effort you've put into making this video, I find it to be very confusing.

This is a great video was unaware of the expansion of Atlantic terminal

At 2:55 I think the real reason the Dyre branch had Lexington Avenue service restored over White Plains Road was because it had lower ridership and thus worked better with the 4 Train. Having both White Plains Road and Jerome Avenue riders sharing Lexington Avenue would have created more crowding issues imo.

Also at 3:30 you mention that the 7 Express doesn't stop at 74th Street-Jackson Heights because they don't want more crowding at the transfers. But it's mostly because there was no express station built at the time (the Flushing line predated the Queens Blvd Line). It's basically the same situation as 59th street-Columbus Circle. it's probably just too much of a hassle to build an express station there now.

Perhaps it would be a good idea to start by defining what in the world interlining and deinterlining even mean?