whats all this cool stuff mounted on top of these geeps? http://railpictures.net/viewphoto.php?id=359312&nseq=1
those are iceicle breakers, they were designed to knock iceicles off of the tops of the tunnels and snowsheds over Donner...these date back to the F7 days, and were first used to save the domes on passenger trains, now they save containers
