Thanks Matt W for the technical explanation.
I seem to recall that when GPS technology first became available, the military required a certain amount of "fuzziness" in civilian applications. I could see how this could be a huge issue because the difference between a cornfield head on collision and normal safe operation is only a few feet apart (different parallel track).
David B--this route was double tracked until the 60s when it was single tracked. The railroad did sell an easement along the right of way to two fiber optic lines . Indeed, at one point (1980s) the line was owned by a SP unit (Chicago Missouri & Western) and Sprint (Southern Pacific Railroad Internal Telephone?) put in a line so perhaps there was a connection as both were part of the Anshutz empire.
I seem to recall that when GPS technology first became available, the military required a certain amount of "fuzziness" in civilian applications. I could see how this could be a huge issue because the difference between a cornfield head on collision and normal safe operation is only a few feet apart (different parallel track).
David B--this route was double tracked until the 60s when it was single tracked. The railroad did sell an easement along the right of way to two fiber optic lines . Indeed, at one point (1980s) the line was owned by a SP unit (Chicago Missouri & Western) and Sprint (Southern Pacific Railroad Internal Telephone?) put in a line so perhaps there was a connection as both were part of the Anshutz empire.