|
|
| train speed over Manhattan Bridge. (909421) | |
 |
|
| Home > SubChat | |
[ Post a New Response | Return to the Index ]
|
| (909421) | |
train speed over Manhattan Bridge. |
|
|
Posted by rbseabeach on Mon Mar 8 18:48:42 2010 I have been riding the trains over the manhattan bridge since the late 1970's The trains always seem to go about the same speed but I will admit they appear to be going a bit faster since the construction was completed in 2004. I rode PATCO into NJ last year and the train flew over the bridge. Is there a specific reason why the trains go so slow over the bridge? |
|
|
| (909423) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by rtype3995 on Mon Mar 8 18:57:12 2010, in response to train speed over Manhattan Bridge., posted by rbseabeach on Mon Mar 8 18:48:42 2010. Its a very steep downgrade once u hit the top of the bridge...... |
|
|
| (909424) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by rbseabeach on Mon Mar 8 18:59:26 2010, in response to Re: train speed over Manhattan Bridge., posted by rtype3995 on Mon Mar 8 18:57:12 2010. that is why trains cannot go fast? |
|
|
(Sponsored) |
iPhone 6 (4.7 Inch) Premium PU Leather Wallet Case - Red w/ Floral Interior - by Notch-It |
|
| (909425) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by Concourse Express on Mon Mar 8 19:22:58 2010, in response to train speed over Manhattan Bridge., posted by rbseabeach on Mon Mar 8 18:48:42 2010. Is there a specific reason why the trains go so slow over the bridge?On the Manhattan Bridge, you have 25 mph grade timers on the decline in both directions on both sides; the need for timers here probably has to do with minimizing bridge flexing and swaying caused by passing trains. my blog |
|
|
| (909432) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by SelkirkTMO on Mon Mar 8 19:55:43 2010, in response to Re: train speed over Manhattan Bridge., posted by Concourse Express on Mon Mar 8 19:22:58 2010. There's also the issue of control. Mist from the river below does tend to do some track lubrication, and you DO want to stop if you have to. :) |
|
|
| (909433) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by SelkirkTMO on Mon Mar 8 19:56:57 2010, in response to Re: train speed over Manhattan Bridge., posted by rtype3995 on Mon Mar 8 18:57:12 2010. Pity that folks don't understand also how little contact there is on rails by the wheel treads when the track is completely dry. |
|
|
| (909435) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by Concourse Express on Mon Mar 8 20:00:09 2010, in response to Re: train speed over Manhattan Bridge., posted by SelkirkTMO on Mon Mar 8 19:55:43 2010. I see. |
|
|
| (909436) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by SelkirkTMO on Mon Mar 8 20:05:09 2010, in response to Re: train speed over Manhattan Bridge., posted by Concourse Express on Mon Mar 8 20:00:09 2010. I'm sure the grade in Philly is MUCH more gentle. But yeah, folks might not realize that the contact area between a 36 inch or so train wheel and the rail is about the size of a dime. And a little "juice" makes a hell of a lot less friction. And on a downhill, you want all the friction you can get. :) |
|
|
| (909437) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by fisk ave jim on Mon Mar 8 20:23:46 2010, in response to Re: train speed over Manhattan Bridge., posted by SelkirkTMO on Mon Mar 8 19:55:43 2010. Forgive the dumb question, does the newer equiptment or any TA equiptment for that matter, have any slip-slide braking ability, ALA Metro-North-LIRR??? |
|
|
| (909438) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by Easy on Mon Mar 8 20:26:31 2010, in response to train speed over Manhattan Bridge., posted by rbseabeach on Mon Mar 8 18:48:42 2010. My guess is that it's because of the grade. I know that it's apples to oranges, but out light rail trains go 55 mph on level ground, but they slow to 25 mph over smaller bridges. I'm pretty sure that the issues are the grade and line of sight. |
|
|
| (909439) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by arnine on Mon Mar 8 20:29:46 2010, in response to Re: train speed over Manhattan Bridge., posted by Easy on Mon Mar 8 20:26:31 2010. Makes Sense |
|
|
| (909441) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by SelkirkTMO on Mon Mar 8 20:32:03 2010, in response to Re: train speed over Manhattan Bridge., posted by fisk ave jim on Mon Mar 8 20:23:46 2010. I believe they all do, to varying degrees of reliability. We've supposedly come a long way since the clop-clop-clop of artens. Heh. |
|
|
| (909454) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by rtype3995 on Mon Mar 8 21:15:34 2010, in response to Re: train speed over Manhattan Bridge., posted by SelkirkTMO on Mon Mar 8 19:56:57 2010. lol.....they can't know everything..... |
|
|
| (909486) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by Westcode44 on Mon Mar 8 23:03:22 2010, in response to train speed over Manhattan Bridge., posted by rbseabeach on Mon Mar 8 18:48:42 2010. Actually the speed on the Man. Brdge was increased over the years from 15 M.P.H. to 25 M.P.H. (after re-building) In addition, 115 Rail was installed (replaced 100 lb rail) across the span. Rumor has it that it was taken out--(weight issue) but I cannot confirm-WE-44 |
|
|
| (909504) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by GOLD_12th on Tue Mar 9 00:23:01 2010, in response to Re: train speed over Manhattan Bridge., posted by rbseabeach on Mon Mar 8 18:59:26 2010. Have you been riding R68 or R68A cars on the Manhattan Bridge lately? |
|
|
| (909580) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by Broadway Lion on Tue Mar 9 10:08:38 2010, in response to Re: train speed over Manhattan Bridge., posted by fisk ave jim on Mon Mar 8 20:23:46 2010. If they do, so what? Slip-Slide is like anti-lock braking on your car: IT INCREASES YOUR STOPPING DISTANCE!ROAR |
|
|
| (909606) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by North-Easten T/O on Tue Mar 9 11:42:53 2010, in response to Re: train speed over Manhattan Bridge., posted by SelkirkTMO on Mon Mar 8 20:05:09 2010. Plus PATCO train are run by Computers, so that also aloud them to run faster. |
|
|
| (909644) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by rbseabeach on Tue Mar 9 14:00:47 2010, in response to Re: train speed over Manhattan Bridge., posted by North-Easten T/O on Tue Mar 9 11:42:53 2010. Thank you, I was about to raise this question as well. If the N,Q,B,& D are run by computers some day, can the speed increase? |
|
|
| (909655) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by North-Easten T/O on Tue Mar 9 15:16:28 2010, in response to Re: train speed over Manhattan Bridge., posted by rbseabeach on Tue Mar 9 14:00:47 2010. Why not. The L does 55mph in the river tube now in CBTC/ATO. |
|
|
| (909660) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by rbseabeach on Tue Mar 9 15:36:03 2010, in response to Re: train speed over Manhattan Bridge., posted by North-Easten T/O on Tue Mar 9 15:16:28 2010. Thank you. So I guess it is possible someday. |
|
|
| (909663) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by SelkirkTMO on Tue Mar 9 15:41:33 2010, in response to Re: train speed over Manhattan Bridge., posted by North-Easten T/O on Tue Mar 9 11:42:53 2010. Partner? Do you have the correct lineup? :)
|
|
|
| (910028) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by N6 Limited on Wed Mar 10 14:27:23 2010, in response to Re: train speed over Manhattan Bridge., posted by North-Easten T/O on Tue Mar 9 15:16:28 2010. Why couldn't it do so before? |
|
|
| (910068) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by North-Easten T/O on Wed Mar 10 17:28:52 2010, in response to Re: train speed over Manhattan Bridge., posted by N6 Limited on Wed Mar 10 14:27:23 2010. I was able to get train up to 50mph in the river tube 8years ago, with the timer back then. You would not see the timer clear. I called it a 50mph Key By, But now if you try it in Bypass you will be tripped. I know, now when I work the L line and I have a train in Bypass I lucky to get the trian up to 35mph at the last timer even those its singed up at 50. |
|
|
| (910130) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by Hoghead on Wed Mar 10 21:29:11 2010, in response to Re: train speed over Manhattan Bridge., posted by SelkirkTMO on Mon Mar 8 20:05:09 2010. PATCO trains do NOT fly over the Ben Franklin Bridge. Max speed is 30 MPH. |
|
|
| (910132) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by SelkirkTMO on Wed Mar 10 21:33:16 2010, in response to Re: train speed over Manhattan Bridge., posted by Hoghead on Wed Mar 10 21:29:11 2010. Only going along with what someone else said ... no personal experience down there. 30 is pretty swift compared to the teeyay tho'. |
|
|
| (910177) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by Hoghead on Wed Mar 10 23:46:11 2010, in response to Re: train speed over Manhattan Bridge., posted by SelkirkTMO on Wed Mar 10 21:33:16 2010. The TA has slowed way down since your time with the handles. Supposedly in the name of safety. PATCO still zips along quite fast in New Jersey. SEPTA 100 (renamed the Norristown High Speed Line as part of their rebranding program) still moves along at a nice clip (MAS 65 mph). The Hiawatha Line in Minneapolis actually makes it up to 55 in a couple of spots.One of the problems seems to be the inability to design a good signal/train control system. The SEPTA 100 is painfully slow coming into the 69th Street berth. I have watched operators try all kinds of different methods. They always end up having to come to a dead stop at least once. SEPTA Market-Frankord is quite efficient, except between 40th Street and 52nd Street. Signal/train control system to blame, not the operator. Minneapolis seems to be an exception. I don't see any sign of the signal/train control system screwing with the operator. Follow the speed control signs; no problems with beeping and having to brake multiple times at a speed change. |
|
|
| (910200) | |
Re: train speed over Manhattan Bridge. |
|
|
Posted by Joe Saitta on Thu Mar 11 01:04:30 2010, in response to Re: train speed over Manhattan Bridge., posted by Hoghead on Wed Mar 10 23:46:11 2010. Dallas DART also operates of 65mph on certain sections. |
|
|
