Originally Posted by falconservice:
Bank the tracks or Super-Elevate the tracks could be an option.
Electronic speed regulation should be possible.
Andrew
From conversations on other boards, it appears that additional super-elevation isn't practical owing to the freight trains that use the line.
Originally Posted by Steve C:
I've been following this very interesting thread and am curious about the change in speed requirement for the 70mph stretch down to 30mph for the curve. Does anyone know about how far (distance) one would have to start decelerating from 70mph to 30 mph and what that distance would translate to in time? I am also a bit curious about the allowable (normal conditions) deceleration rate for passenger vs freight trains.
Thanks.
Steve
Some EMU's are capable of impressive braking. By that I mean rapid-transit equipment. While riding a thru-express subway in the Bronx a day or so ago, I watched my train slow from almost 40MPH to 16 in slightly more than ten seconds in response to timed signals guarding a sharp curve. (to see the area in question, plug "freeman street and southern boulevard bronx" into Google Maps satellite view--the braking started and ended within the space occupied by the train visible on the middle track that just passed the station)
Now, I wouldn't expect a commuter train (even an electric one) to match that performance, but it's probably on par with any other locomotive-hauled passenger train, and definitely better than a freight train (see Number 90's story on the previous page). Of, you can view this video to see an example of a freight train in emergency (the best example I know of)
---PCJ