Noun
The use of two locomotives at the front, or head, of a train.
Usage- Uncountable
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More examples (3)
Mr. S. T. Yaxley recalls that the Garratts were first placed in service on the Toton-Brent and Toton-Wellingborough coal trains and empties back, eliminating much of the double-heading which prior to their introduction was so prevalent in Midland freight train operation.
There appeared to be no restrictions on single-manning of locomotives in Belgium, but multiple-unit control of two locomotives by one driver has not been adopted; when double-heading is required a driver is put in charge of each locomotive.
[...] Fowler was responsible for a conservative small engine policy at the LMS, previously adopted on the Midland, which led to much double-heading - although the Royal Scot 4-6-0 express passenger locomotive was also introduced on his watch in 1928.