From: ahk@chinet.com

Stephen Sprunk  wrote:
>On 17-Apr-15 21:02, Michael Finfer wrote:

>>One of the issues here is that SEPTA chose a PTC system that is
>>incompatible with the one CSX will be using.  I am still shaking my
>>head over that.  Interoperability was supposed to be one of the key
>>features of operating a national system.

>There is no "national" PTC system; every railroad is developing their
>own, and while at least some of them are supposed to be interoperable,
>in practice that never turns out as well as promised.  We also won't get
>the benefits of economy of scale that way.

What the hell does economy of scale have to do with anything? There are
huge, expensive problems to overcome, like lack of radio spectrum
capacity particularly in Chicago and that FCC is way way behind on
issuing licenses for all the new transmitters and relay stations,
and the complete idiocy of the design that the entire railroad infrastructure
plan must be downloaded into the locomotive each and every time the
fucking consist changes direction because, you know, somebody installed
a brand-new turnout in the last hour.

It's one massively stupid fuckup. Economy of scale is mostly irrelevant.

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