The physical zones around a train where the operating crew has no direct line of sight. Due to the massive long hood of a road switcher or the sheer length of a consist, these hidden areas can stretch for dozens of feet ahead of or behind the cab. Ground crews must stay out of these zones or maintain constant radio contact to ensure safe movement.
Heard on the job
Don't walk behind the trailing unit, you're in a blind spot and he's about to shove.
Insider tip
Never assume the engineer can see you; if you cannot see their eyes in the mirror, you are invisible to them.