Can anyone tell me the steepest mainline
gradients on US transcontinental lines?
I think you'll find them moderately
steep - came through the Rockies in 1997 on the California Zephyr and
would be surprised if they weren't around 1 in 40 in places. The
Americans have latterly used pretty powerful locos, particularly in the
mountainous country. The Cajun Pass, on UP's line in California is
1 in 36. Suggest you try a posting to misc.transport.rail.americas
or alt.railroad, you'll most likely get replies as a percent grade from
the locals.
regards
David Bennetts
Canberra