$165 million dollars for a GPS and anti-collision system? Heck they could just use their iPhones and besides it's not like there are dozens of trains on the track going different directions. Really when was the last time a AR train ran into another? Seems a bit of over-kill by the feds in dealing with Alaska transportation. Location and anti-collision seem are much simpler by other means.  Watch as they install the system and then it will need constant maintenance for glitches. In 2 years it will be obsolete or broken.  See state DOT RWIS system.