I was told that it was impossible to do because even though we had the rolling stock, we did not have the ability to deal with a union that had the opportunity to charge double time, triple time and all kinds of things on a train that was going across the country for two or three days.
This article talks about locomotion.
( z1 talk :ARG0 ( z2 article :mod ( z3 this ) ) :ARG1 ( z4 move :manner ( z5 locomotion ) ) )