While the interstate highways of the U.S. quickly take shape in the mid-1950's, the air routes began even earlier. The air mail routes were established in 1918, and here by 1942, we see the highways of the air being codified as corridors reaching from Key West to Vancouver and all points in between. An uncommon look at all the flight routes across the entire U.S. Condition is fair with some dampstaining and marginal old tape stains. Image size is approximately 28 x 40.25 (inches)
