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Aerial view of Interstate 5 in downtown Medford, where it travels on an elevated viaduct. I-5 enters Oregon at the California state line in southern Jackson County.The highway travels northeast along a ridge in the Siskiyou Mountains, with a maximum grade of 6 percent, to Siskiyou Summit; [12] at 4,310 feet (1,310 m), it is the highest point on all of I-5 and one of the highest points on the ...
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]
Interstate 5 (I-5) is the main north–south Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels through the states of California , Oregon , and Washington , serving several large cities on the West Coast, including San Diego , Los ...
Oregon Route 99W is a state-numbered route in Oregon, United States, that runs from OR 99 and OR 99E in Junction City north to I-5 in southwestern Portland. Some signage continues it north to US 26 near downtown, but most signage agrees with the Oregon Department of Transportation 's (ODOT) description, ending it at I-5.
The Siskiyou Mountains form the watershed boundary between the Klamath and Rogue Rivers and are also a rough natural separator between Oregon and California. The summit on Interstate 5 is about 12 miles (19 km) south of Ashland, Oregon, 25 miles (40 km) north of Yreka, California, and 0.5 miles (0.80 km) east of the historical Siskiyou Pass, the most used mountain pass in the state. [2]
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 38 is an Oregon state highway that runs between the city of Reedsport, on the Oregon Coast, and an interchange with Interstate 5 near the communities of Curtin and Anlauf. It is also known as most of the Umpqua Highway No. 45 (see Oregon highways and routes ), as the western portions of the highway run alongside the Umpqua River .
1918 state highway map. The initial primary state highway system was designated in 1917, [3] initially consisting of 36 named and numbered highways, [5] including some designated earlier that year by the Oregon State Legislature and others added to the network by the Oregon State Highway Commission, the predecessor to the OTC. [6]