Western Railroad Discussion > ABS on UP Montana Subdivision

The UP has ABS between Spencer and Humphrey. Is this for the slide detectors in the canyon?

KD7ZST Wrote:
-------------------------------------------------------
> shortlineboss Wrote:
> --------------------------------------------------
> -----
> > The UP has ABS between Spencer and Humphrey.
> Is
> > this for the slide detectors in the canyon?
>
> Nowadays, yes. The ABS picks up at MP#245.25
> (2.75 miles south of Spencer) and ends at MP#262
> (3 miles north of Humphrey).

"Nowadays"? You imply that there used to be another use -- can you expound upon that?
Thanks,
-Wes

Helpers are still used... just extra units handed off between trains for Monida Pass