Arctic Passage(1943)

Arctic Passage (RKO "This Is America" series) is a documentary showing the construction of the highway from British Columbia to Alaska: the seemingly insurmountable barriers to be overcome, the boom towns that ro se up on the way, the mud, the mosquitoes, the cold-and, finally, a trip with the first truck convoy to cover the route. It is an effective, well-edited story of a real happening.

Official site