In the
U.S. state of
Oregon
Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of it ...
, 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
The Oregon Department of Transportation (ODOT) is a department of the state government of the U.S. state of Oregon responsible for systems of transportation. It was first established in 1969. It had been preceded by the Oregon State Highway Depar ...
(ODOT) whereas numbered routes, such as
Interstate 5 (I-5),
U.S. Highway 20
U.S. Route 20 or U.S. Highway 20 (US 20) is an east–west United States Numbered Highway that stretches from the Pacific Northwest east to New England. The "0" in its route number indicates that US 20 is a major coast-to-coast route. ...
(US 20), or
Oregon Route 140 (OR 140), are posted on
road signs and
route markers. The two systems overlap significantly, but the route numbers are not necessarily coterminous with highway names and some routes may comprise several highways. For example,
OR 47 is overlaid on the
Mist–Clatskanie Highway No. 110,
Nehalem Highway No. 102, and
Tualatin Valley Highway No. 29. In addition to OR 47, the Tualatin Valley Highway No. 29 also comprises part of
OR 8.
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Mainline routes
Special routes
References
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{{reflist
State routes