DCHP-1 Online
tractor train North 
n. a tractor-drawn train of sleds and cabooses (def. 5), the principal means of transporting freight, supplies, etc. in the Canadian North in winter.
See also: caboose (def. 5) cat-train
- 1936 [Presently, weird-looking tractor-like machines, drawing veritable young freight trains on bob sleighs, were creeping through the northern bush, over lake and stream and muskeg. . . .]
- 1941 The contractors hauled . . . some eight hundred tons of supplies . . . by tractor train through heavily timbered country. . . .
- 1965 A tractor train crawled most of the forty miles from Stewart, only to be turned back by the threat of a new avalanche.
- 1936 [Presently, weird-looking tractor-like machines, drawing veritable young freight trains on bob sleighs, were creeping through the northern bush, over lake and stream and muskeg. . . .]