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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]
Two separate numbering systems are used: routes (e.g. Interstate 84, U.S. Route 26, and Oregon Route 140) are those used by the general public, and their shields are posted on guide signs and maps. These comprise the Interstate Highways, U.S. Highways, and Oregon state routes (e.g. OR 201).
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 ...
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]
Interstate 84 is the longest freeway in Oregon, at over 375 miles (604 km) in length, and is the only Interstate to traverse the state from west to east. [2] The highway connects the Portland metropolitan area to the Columbia River Gorge, the northeastern Columbia Plateau, and part of the Snake River Valley. [3]
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 ...
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OR 99/OR 99W in Junction City: OR 99/OR 99W in Portland: 1928: 1972 Now OR 99E: US 99W — — OR 99/OR 99E in Junction City: OR 99/OR 99E in Portland: 1928: 1972 Now OR 99W: US 101: 363.11: 584.37 US 101 towards Crescent City, CA: US 101 towards Aberdeen, WA: 1926: current US 126 — — OR 99 in Eugene: US 26 in Prineville