Behind "X" Trims – Trims are sorted tracks of cars in a hump yard pulled out of the sorting tracks and coupled to make up outbound trains. A yard "behind on trims" is behind on its outbound train building.
Building Trains – Assembling sorted cars in proper sequence for outbound departure.
Enroutes – Count of trains destined to a particular yard or terminal that need to be switched. "Strong enroutes" indicates a forecast for a heavy switching workload for that day.
Humped – Count of cars that are sorted in a hump yard.
Trim Lead – Track used to move cars from the bowl (sorting tracks) to the departure yard, where sorted cars are coupled into an outbound train.
Trimmed – Count of sorted cars built into outbound trains.