National Highways AssociationBordered by texts describing the organization and work of the Oregon Trail Memorial Association, Inc.; Caption title: Good roads everwhere--four fold system of highways.; Shows National Park-to-Park highways, Associated Tours highways, main traveled highways and Oregon Trail National Road highlighted in blue.86 x 127 centimeters, on sheet 92 x 142 centimetersJPEGUMN_ALMA:9974084188501701engA. Hoen & Co (Baltimore, MD)PublicUnited States touring map : showing 250,000 miles of principal traveled highways including National Park-to-park highways ...MapsUniversity of Minnesota