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Old August 28th, 2016, 02:03 AM   #3901
Fabio1976
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Originally Posted by Miami High Rise View Post
Yes but 100 seconds only where there are four or six tracks when you count multiple routes. ie the 4 and 5 and the six running downstairs. There's no less than two minutes on a single track.
7-L-G and many shuttle (S Franklyn Avenue-S Rockaway Park-A Lefferts BLVD-M-R-5) of the NYC subway, but also the Path, the Staten Island Railroad, the JFK Air Train HAVE ONLY 2 TRACKS and ARE 24/7 !!! Same situation for the metro Copenhagen, the Red and Blue line of the EL Chicago and even for the Patco Philadelphia. Only excuses the maintenance jobs.....
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Old August 28th, 2016, 02:53 AM   #3902
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Of course. As do tons of metro and light rail and other systems. But those are not that big of tph. That disqualifies them from the discussion of comparing best to best headways. But just cause you mentioned it, there are two track systems with 90 second or less headways. Of course it's possible. Why wouldn't it be? Even a minute is longer than you think, if you literally count out 60 real seconds. But those systems are mostly light rail and short to very short train lengths. The speed can pbe just as high though, since NYC subway is fairly slow. Two minute headways are the shortest I've seen in the Lexington, and on the real time screens (if they even are), I think it's only as low as two minutes as a rounding error (really closer to 2.5 mins - 150 seconds) and/or when there are delays (all tf-ing time) so they are scrunched to closest actual (not time tabled) running space.
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Old August 28th, 2016, 03:12 AM   #3903
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Quote:
Originally Posted by Fabio1976 View Post
7-L-G and many shuttle (S Franklyn Avenue-S Rockaway Park-A Lefferts BLVD-M-R-5) of the NYC subway, but also the Path, the Staten Island Railroad, the JFK Air Train HAVE ONLY 2 TRACKS and ARE 24/7 !!! Same situation for the metro Copenhagen, the Red and Blue line of the EL Chicago and even for the Patco Philadelphia. Only excuses the maintenance jobs.....
I'm guessing you haven't seen my lengthy response (made 10 hours before this one of yours I'm quoting) to your near-identical post in the London thread? In it I seek to explain the key reasons why you can't have single track running in London - some of which I've also repeated in this thread. I'm guessing you haven't seen it as you make no effort to engage with it, but then your 'response' to Miami High Rise showed that you made no effort to read his post, but used the discussion of numbers of tracks in it as justification to post your disengaged snipe again.

Maintenance is a very very good excuse - it's safety critical. But it's not the only one London has. When you can:
- tell me how to create more crossovers (so trains can run at frequencies that aren't pointlessly low if single track running is used to work on one track while still running trains) where the tunnels are twin-tubes that are often at different levels
- tell me how to avoid bad publicity by creating what even the general public agrees are dangerous work conditions when single-track working to work on the other track everywhere else
- stop suggesting that as a less-than-15-year-old metro (Copenhagen) can do something that a metro 10 times older (that has been modernising for more than 15 years and still isn't done) has to be able to do it
then, and only then, will I think you have a valid point.
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Old August 28th, 2016, 03:22 AM   #3904
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The Market-Frankford Line in Philadelphia runs 24/7 and has minimum headways of under a minute.

But this is a thread about New York, not Philadelphia or London. Lets get on topic.
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Old August 28th, 2016, 03:30 AM   #3905
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Dragging this thread back on topic, my look earlier at NYC Subway frequencies was interesting - quite a lot of uneven frequencies running together that don't mesh well: eg the (N) and the (Q) being 7.5 and 8.5tph respectively (a more sensible 6 and 6 off-peak), (A) and (C) being 18 and 7tph (8 and 6 off-peak). These mishmashes will surely limit the capacity on the line, should there be demand for additional trains.
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Old August 28th, 2016, 03:36 AM   #3906
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It has to do with the track configurations. The East River tunnels are all double-track, with the lines in Brooklyn and Manhattan being quad.
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Old August 28th, 2016, 08:01 PM   #3907
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Quote:
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The Market-Frankford Line in Philadelphia...has minimum headways of under a minute.
This is not a fact.

Unless you mean briefly when the skip stop catches up to the local.
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Old August 29th, 2016, 01:33 AM   #3908
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This is a fact from having ridden it repeatedly.
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Old August 29th, 2016, 04:14 AM   #3909
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Quote:
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The Market-Frankford Line in Philadelphia runs 24/7 and has minimum headways of under a minute.

But this is a thread about New York, not Philadelphia or London. Lets get on topic.
The Market-Frankford Line ( and the Broad Street Line ) in Philadelphia was 24/7 until 1991; now it is 24/2.
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Old August 29th, 2016, 04:33 AM   #3910
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The headway is four minutes. According to them.
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Old August 30th, 2016, 01:52 AM   #3911
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New York subway is offering free ebooks (and Wi-Fi) for your commute

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Old August 31st, 2016, 12:03 PM   #3912
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Quote:
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The EL in Chicago was built with higher specs than the ELs torn down in NEw York. And so were some of the elevated subway lines in NY that are still standing.
Those structures could be reinforced.
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Old August 31st, 2016, 03:56 PM   #3913
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And there were rolling stock designed that were light enough to handle the structures, like the Bluebird.
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Old August 31st, 2016, 10:02 PM   #3914
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On the street, you can often hear the subway trains through the grates - the trains are just below the street.
Which sometimes can even create visible effects

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Old September 3rd, 2016, 01:37 PM   #3915
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Question: What's the use of the 42nd Street Shuttle if there's the IRT Flushing Line paralleling it below?

Is it like the Drain in London, which only has one purpose - to get people from Waterloo station to the City?
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Old September 3rd, 2016, 03:51 PM   #3916
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I took the 42nd Street Shuttle when I visited New York.

Your Trusted Source of Photographs from Pennsylvania and New York
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Old September 3rd, 2016, 05:32 PM   #3917
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Quote:
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Question: What's the use of the 42nd Street Shuttle if there's the IRT Flushing Line paralleling it below?

Is it like the Drain in London, which only has one purpose - to get people from Waterloo station to the City?
The sole purpose of the 42nd street shuttle is to move people between Grand Central Terminal and Times Square.

If those passengers took the 7 line that line would be over crowded. The 7 line does not operate as frequently as the shuttle.
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Old September 3rd, 2016, 11:14 PM   #3918
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The 7 is already very crowded, and its stations are not as conveniently located.

Its worth noting that the shuttle predates the 7.
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Old September 4th, 2016, 11:24 AM   #3919
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Source: https://en.wikipedia.org/wiki/Brookl...k_City_Subway)

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Old September 5th, 2016, 10:27 AM   #3920
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The 42nd St Shuttle is also a remnant of history, where the original route came up Park from downtown, across 42nd St and then up 7th Ave and then along Broadway through the Upper West Side.
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