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BlastOButter42

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  1. More than two years later, the answer might be...maybe? Seems there's finally some small (growing?) recognition of just how much they overreacted with the timers. https://www.villagevoice.com/2018/03/13/the-trains-are-slower-because-they-slowed-the-trains-down/ https://www.nytimes.com/interactive/2018/05/09/nyregion/subway-crisis-mta-decisions-signals-rules.html
  2. Hi folks, Hoping anyone who knows a bit about DM30AC operations on the LIRR could provide some information on the changeover from electric to diesel power and vice-versa. When/where does the changeover generally occur? Do they operate in electric mode only in and around the East River tunnels and switch to diesel as soon as possible eastbound/as late as possible westbound? Or do they operate in electric mode as much as possible where electrification is present? Also, does the changeover occur at line speed or only while stopped? Asking in part because I know Metro North and Amtrak's P32AC-DMs operate in electric mode as little as possible -- even though (in the case of MNR) electrification extends all the way to Croton-Harmon and Southeast on the Hudson and Harlem lines, a northbound train will switch to diesel before hitting the Bronx. At least one unofficial source I found attributed this to operational restrictions due to the need to draw power for the entire train from low-voltage third rail from one locomotive, with the resulting high current causing lots of arcing and possible damage. Consistent with this is the fact that NJT's ALP-45DPs operate in electric mode from 25 kV AC catenary and don't have this restriction. So I'm wondering if it also applies to the DM30ACs.
  3. But why are there so many timers along there? It's pretty straight overall. Such severe restriction seems unnecessary. Are timers really necessary anywhere there's a switch, even if the train isn't diverging?
  4. A weekday night run from 59th to 125th on the is scheduled at 8 minutes. That's only 3 minutes faster than a local run, even though it skips 7 stops. By comparison, over on Broadway, the / from 34th to 96th (which is about the same distance -- ~3.3 miles compared to ~3.4) is also scheduled at 8 minutes, even though there are two intermediate stops. And it does seem while riding that the trains never hit the same speeds as they do between, say, 14th and 34th, even though that's a much shorter trip. It's also pretty straight. Same deal southbound -- seems like trains start braking for 59th all the way back at 81st. Is there any particular reason for that? Is the track in worse shape or something?
  5. How much is the Central Branch between the Ronkonkoma Branch and the Montauk Branch used? Is it ever used regularly?
  6. Pic: http://www.nycsubway.org/perl/show?80174 (not mine)
  7. Welcome to the forums. I am S78 via Hylan :)


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