Quote:
Originally Posted by Policy Wonk
The 267% number is similar to claiming the passenger capacity of a Boeing 727 is 330 because that many people were physically stuffed on a 727 during an evacuation flight from South Vietnam and it still got off the ground. In any event, I think the N.E. is going to densify along 36th Street more than anywhere else in the city outside the core. I don't believe that mid-century 7th Ave will be able to perform satisfactorily at grade at reasonable headways.
Capacity for this purpose should be the peak number of movements that can occur comfortably within the limitations incurred by operating at grade and at low speed with a large number of surface crossings. We passed that threshold a very long time ago.
Perhaps we just aren't thinking in the same timeframes here. I doubt much more than the S.E. LRT will be built in my lifetime. I don't think I will live to see the 8th Ave Subway, much less 7th Ave or the North Central LRT. Politics will dictate the S.E. LRT comes first and I think the 8th Ave subway should have come before the West LRT. I also believe we're about to enter an era of severe austerity and low commodity prices.
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So what is the level of traffic that 7th will be allowed to see in the future before the ever-generous future administrations fund an expensive tunnel? Right now, the peak hour in the AM (measuring WB at City Hall) is 6:45-7:44, when 29 trains enter the downtown. You have said that up to a quarter of 7th Ave trains fall behind schedule, but this is a cascading thing - one bad train screws up three behind it. I suspect a reduction from 29 to 25 would radically reduce delays. Would 25 trains an hour be a reasonable schedule?
Or should we get crazy, let's cancel all the late trains. If 3/4 of the trains are on time even with trains ahead of them running late, surely if those trains all disappeared there would be no problem with delays. Rounding down, that's 21 trains an hour. Is going down to a 21 train per hour schedule a reasonable reduction in traffic, per whatever expertise you have? Do we have to go to 10 trains?
You claim that for vague reasons an administration not yet born will surely never allow some hidden arbitrary level of train traffic. What, in your opinion, is the level of traffic that will drive a future administration to say "instead of cramming one more train on there, we're spending a billion dollars on a tunnel" ? Some specific reasoning with numbers would be welcomed, although a Delphic proclamation would be fine.