troops had to repair and service their equipment as best they could, but facilities were badly overtappedadlined for weeks at a time. ♪ >> at the start, troops working on the highway had only tents for living quarters. ♪ >> by the beginning of 1943, most of them were living in quonset huts. they could be erected in a few hours. following behind the soldiers who built the pioneer road came civilian contractors to turn it into a permanent, all weather road. they established their own camps along the route. ♪ >> there were public roads administration surveyors to relocate and improve the alignment of the road. ♪ they were skilled crews with power shovels to widen the road and cut down grade. ♪ >> there were crews with trucks to haul gravel. ♪ >> their were dirt moving machines as well as trucks to tilde the road -- two build up the road. there were bulldozers to pack down the gravel. and to dig ditches. ♪ >> they were motor graders to smooth the turf. there were skilled structural workers and carpenters to build permanent bridges, replacing the temporary ones from the engineers. ♪ >> as ice