The Union Pacific RR web site (http://www.up.com/aboutup/reference/glossary/railroad_terms/...
) has a glossary of terms, including this entry:
Movement of a crew from one point to another or to a train by vehicle transportation or by train.
I believe railroads go near that area? I don't know if this is what the census is referring to (maybe someone who managed the shuttling of crew members), but maybe?