Re: Train Accident in Blue Mountains

["Dave Proctor" <daproc@sd5.mailbank.com>]

Bernard Smith wrote in message ...
>I don't know about the signal spacing in the Blue Mountains, but it is
>possible to run trains at 2-3 minute spacing in the metro area.
>
>Given that the Lithgow train is all stations and the IP an express, the gap
>should be opening not closing as they progress through the mountains.

Not really. The I-P would be going at a fairly constant rate (given a long,
reasonably heavy (but nowhere near as heavy as a coalie) train going down a
steep hill.

The DDIU, on the other hand, will be accelerating and decelerating
constantly, would be going reasonably fast, given the better brakes (in
theory) and better acceleration and deceleration,

Dave