Interstate 505 (Oregon)
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| Route information | ||||
| Maintained by ODOT | ||||
| Length: | 477.02 mi (767.69 km) (using the entire Huntington Highway through Lime) |
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| Major junctions | ||||
| West end: |
 US 101 in Astoria
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 I-84 from Hood River to Idaho |
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| East end: |
 I-84 / US-30 at the Idaho state line |
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| Highway system | ||||
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| Location: | Portland |
| Length: | 1.44 mi (2.32 km) |
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I-405 in Portland
I-5 in Portland
In the U.S. state of Oregon, U.S. Route 30, a major east–west U.S. Highway, runs from its western terminus in Astoria to the Idaho border east of Ontario. West of Portland, US 30 generally follows the southern shore of the Columbia River; east of Portland the highway has largely been replaced with Interstate 84, though it is signed all the way across the state, and diverges from the I-84 mainline in several towns, as a de facto business route. (The state of Oregon does not sign Interstate business routes; instead it uses the designations US 30 and Oregon Route 99 (along the Interstate 5 corridor) for this purpose.)
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