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The Oregon state government initially proposed numbering the auxiliary Interstates using lettered suffixes, but were denied in 1958 by the American Association of State Highway Officials (forerunner to the AASHTO). [7] The last section of the Interstate Highway system to be built in Oregon, on I-82 near Hermiston, opened on September 20, 1988. [8]
In the U.S. state of Oregon, there are two systems for categorizing roads in the state highway system: named state highways and numbered state routes.Named highways, such as the Pacific Highway No. 1 or the North Umpqua Highway East No. 138, are primarily used internally by the Oregon Department of Transportation (ODOT) whereas numbered routes, such as Interstate 5 (I-5), U.S. Highway 20 (US ...
Oregon Route 140 (OR 140) is a state highway in southern Oregon, United States. It is the longest state highway in Oregon, running 237 miles (381 km) from the community of White City, Oregon (just north of Medford), through Klamath Falls and on to Lakeview. It then continues east, eventually descending into the state of Nevada. [1] [2]
1940s-style sign for Oregon Route 50, incorporating the Seal of Oregon. The primary, two-digit route numbers were laid out in a grid system, similar to the Interstate Highway System. Odd-numbered routes were north–south and increased in number bearing west, ranging from OR 3 in Wallowa County to OR 53 in Clatsop and Tillamook counties.
Interstate 5 is the second-longest freeway in Oregon, at 308 miles (496 km), and is the only Interstate to traverse the state from north to south. [4] The highway connects several of the state's largest metropolitan areas, which lie in the Rogue and Willamette valleys, [5] and passes through counties with approximately 81 percent of Oregon's population. [6]
Oregon Route 42 (OR 42) is an Oregon state highway which runs between U.S. Route 101 on the Oregon Coast, near Coos Bay, and Green, a few miles south of Roseburg on Interstate 5. OR 42 traverses the Coos Bay–Roseburg Highway No. 35 of the Oregon state highway system. [2] The route splits at Coquille, where Oregon Route 42S heads southwest ...