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Re: G Train Loop

Posted by Stephen Bauman on Thu Jun 22 22:16:34 2017, in response to Re: G Train Loop, posted by AlM on Thu Jun 22 10:52:50 2017.

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The fumigation policy prevents short turning trains, where relay tracks currently exist. This means that trains must operate longer distances, where they may not be needed.

The subway system does a bad job of getting commuters from Grand Central and Penn Station to the Financial District and Downtown Brooklyn. This deficiency is limiting the growth of both these areas.

Consider an 8th Ave express that would short turn between Queens Plaza and 36th St and beyond Hoyt-Schermerhorn on center track between the Lafayette Ave and Clinton-Wash Aves stations. The switches in Brooklyn would have to be changed, but that's a relatively inexpensive job.

What will the MTA do, if it ever finishes ESA? Lex service can be greatly expanded by short turning locals on the local relay track just north of 59th St. The locals could even switch from local to express at Brooklyn Bridge, and loop at South Ferry.

The 14th St Line's capacity is limited by the 8th Ave terminal. Even though the MTA states that service levels currently match demand. Most riders would disagree. There's a middle track between 8th and 6th Aves. Alternate trains could short turn at 6th Ave. This could effectively double service level capacity. It would also cost far less than the RPA's idea of adding tail tracks.

Besides fumigation, the one minute reversal time is another impediment. The reversal time is essentially the time to discharge and recharge the brakes. If the trains were designed to permit reversing direction without discharging the brakes, a separate separate reversal track would not be required for relays. One service that connects midtown with Brooklyn would be a short line between 60th St/Lex and Metrotech.

There would be a lot more flexibility in the system to operate additional trains on short notice, if direction reversal were quicker. The two delaying factors are fumigation and brake discharge/recharge.

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