Southbound on the Big Horn Subdivision, BNSF 7621 approaches a signal at MP 780.1 with six other engines in tow.
BNSF 9407 leads, as the quartet silently coasts an empty coal train down grade.
A trio of EMDX Oakway's, move empties for Kennecott Energy, south on the Casper sub.
Isn't that signal supposed to be lit?
