Switching with loco both ends of train

[Green_Elite_Cab]

I don't have any pictures, but I've seen my local CSAO freight on the Pemberton Industrial track travel east from Pavonia yard with a locomotive on each end, and then return to Pavonia with both engines on the west end of the train. All switching was done as the train traveled back west to Pavonia Yard.

Presumably, the dual engines allowed the train to be "bi-directional".