Map showing average daily vehicle trips between downtown Portland and other points, July-September 1946. The thickest lines indicate the most traffic. The three largest lines visible describe traffic west to Scholls Ferry Rd. and south to Macadam Rd. and Hwy. 99-E. The map also shows a medium-weight line to the city of Vanport (which is not named on the map), just south of Hayden Island on the Columbia River.
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- OREGON 625.7 O67po 1946