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Re: Nisqually Line Questions
Author: Eric Cartmann
Date: 03-06-2017 - 12:34

Goat Wrote:
-------------------------------------------------------
> Some questions I have on the newly rehabilitated
> Nisqually Line (Point Defiance, WA bypass)
>
> When driving on Southbound I-5 at Berkley St /
> Tillicum you can see various signs along the
> track.
>
> 1. P 68 MPH South of the Berkley street crossing
> about 1/10 of mile
> 2. P 70 MPH South of the 68 MPH sign 1/10 of a
> mile.
>
> Why the change of 2 MPH for P trains?
>
If there is a curve in the direction of travel, where the speed limit reduces by 2 mph, it is probably because Superliners will tilt more than 3' going through the curve. The reduced speed (by 2 mph) is most likely to keep the Superliners within their designed tilting (Cant Deficiency) qualifications. This is why you also see speed boards w "T" on them, for the Talgo equipment, which can run up 6 inches of tilt.

EC

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Subject Written By Date/Time (PST)
  Nisqually Line Questions GN Goat 03-06-2017 - 01:45
  Re: Nisqually Line Questions Eric Cartmann 03-06-2017 - 12:34
  Re: Nisqually Line Questions GN Goat 03-06-2017 - 12:45
  Re: Nisqually Line Questions Erik H. 03-06-2017 - 14:53
  Re: Nisqually Line Questions BN Oly 03-06-2017 - 18:17


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