Quote:
Originally Posted by schnickelfritz
Track/Right of Way/Facilities inspection and maintenance of US Railroads (ans I would assume Canadian as well--CN has a main a few miles away and I see a lot of the same equipment with "CN" on the side) is typically done by what is known as "Hi-Rail" or "Hy-Rail" equipment. These are civilian market vehicles from 3/4 ton on up that have rail equipment fore and aft that can be retracted to allow use on standard roads. These go all the way up to three axle 2 to 5 ton trucks.
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That sort of hydraulically activated rail equipment has been extensively discussed in a previous thread (it was quite a while back though). We have vast stretches of rail line here in Australia, especially where the inland iron ore mines need to get their ores to the export ports along the coast. I've seen dozens of those sorts of hi-rail hybrid vehicles in the north-west of Western Australia. The Pilbara rail lines need very regular inspections because the extreme heat can warp the tracks and also some of the ore trains are literally several kilometers long so a derailment can be extremely expensive (it take a couple of kilometers to stop those big ore trains so when they derail it can be a nightmare to clean up).