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| Re: PRESS RELEASE Re: It's Offal? W train returning (1386309) | |||
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Re: PRESS RELEASE Re: It's Offal? W train returning |
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Posted by chris3117 on Sat Feb 20 23:14:02 2016, in response to Re: PRESS RELEASE Re: It's Offal? W train returning, posted by Steve B-8AVEXP on Sat Feb 20 22:54:46 2016. Has anybody heard this before: This is what they says according from straphanger website for the future extension SAS if will happen the Phase 2 to 125th Street Harlem; This is very smooth efficient service.Actually, the plan belongs to Broadway Lion from Subchat. Nevertheless, it’s a plan with few cons. This plan will only work if the first two phases (though only Phase I can work) of the SAS are opened. Rush Hour Service (N) 125th Street to Coney Island via Broadway Exp. and Sea Beach (same route, but after 57th the route goes uptown) Runs every 6 minutes, or 10TPH (currently runs every 7 minutes, 8 in the PM) (Q) 125th Street to Coney Island via Broadway Exp. and Brighton Lcl. (this is the proposed route of the Q currently) Runs every 5 minutes, or 12TPH (currently runs every 6 minutes) (R) Forest Hills to Bay Ridge via current route Runs every 6 minutes, or 10TPH (current headway) (W) Ditmars Blvd. to Whitehall St. Alternate trains continue to 9th Ave., Brooklyn Runs every 5 minutes, or 12TPH Explanation (scroll to bottom if too confusing or too lazy to read) First, you may be thinking that I’m changing quite a few routes. Really, I’m not. This is really all I’m changing: The N goes to 125th instead of Astoria, and some W trains continue to 9th Ave. He wants to change the N’s terminal and leave Astoria with the W? The answer is yes. W service will be added so that Astoria riders get the same level of service as they do now with both the N and the W. Let me say it like this: The goal of this plan is to have as few merges on the Broadway line as possible for maximized service. Let me show you why this plan works in terms of track capacity. If you notice, I’m not decreasing service on any line either or removing service (Astoria line riders lose the N but get double the W). Max track capacity is 30TPH. For the sake of incorporating outside forces, max capacity is 24TPH. Now, the W will run 12TPH along Astoria, which will merge with 10TPH in the 60th St. tunnel. That’s 22 TPH all along the Broadway local until Whitehall Street, with no other merges. 22 < 24. Whitehall st. can turn about 6TPH (current W train TPH), so the other 6 W trains continue to 9th Ave. in Brooklyn on the West End. 6TPH can hardly interfere with other operations in Brooklyn. Montague tunnel traffic will be 12 TPH. 12 < 24. Now for the Broadway Express. Both the N and Q start at 125. N has 10 TPH, Q has 12TPH. 22 < 24. 22TPH all along the Broadway Express in Manhattan and into Brooklyn. At this point I should mention that if you don't know already, SAS is being planned with CBTC. Let's boost the SAS segment capacity to 34TPH because now we can. Optimal CBTC track capacity is 40TPH. However, service remains 22TPH. Why This Plan Works "Riders will be too confused if their W goes to Brooklyn or not. Riders in Brookyln will wait too long for a W." Mind you, this is EXACTLY what the MTA is planning for extending the Q in Queens to replace the W. Q trains run to Astoria every 12 minutes, when normal headway terminating at 57th is 6 mins. Also, riders can just take the R along 4th Ave. in Brookyln. "Astoria Riders lose their one-seat express in Broadway." One of the great things about this system is that good local service often appeals to riders better than express service every 10 minutes. "I'm confused. This plan is too confusing." The only things changing are that the N changes terminals to 125th St. and some W trains go to 9th Ave. The only three merges in the VICINITY are DeKalb Ave, 60th St., and Second Ave. with the T and the N/Q. None of them are problems and are under the max track capacity. "What about CBTC?" Since the SAS will be all CBTC, and there are no merges in Manhattan on the Bway Exp., CBTC can be equipped on the Bway Exp. until Brooklyn. IF YOU'RE CONFUSED Max track capacity = 24TPH Broadway Local track capacity under this plan: 22TPH Express track capacity: 22 TPH MINIMUM MERGES What does everyone think? BTW, sorry for the long post. EDIT- BTW, during all other times the W runs to Whitehall St. only since the decreased TPH during all other times means that all trains can be turned at Whitehall. |
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