Interstate 405 (Oregon)

For other uses of "Interstate 405", see Interstate 405 (disambiguation).

Interstate 405
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Route information
Maintained by ODOT
Length:	4.25 mi (6.84 km)
Existed:	1950s – present
Major junctions
South end:	I-5 in Portland
	US 26 in Portland US 30 in Portland
North end:	I-5 / US 30 in Portland
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Oregon Highways Interstate US State Named Scenic ← OR 402 OR 410 →

Interstate 405 (I-405, also known as the Stadium Freeway No. 61) is a short Interstate Highway in Portland, Oregon. It forms a loop from Interstate 5 that travels through downtown Portland west of the Willamette River.

Route description

Interstate 405's southern terminus is at a complex Y-like stack interchange with Interstate 5 and Harbor Dr. (formerly Harbor Freeway) in the South Portland neighborhood, near the southern edge of downtown. The highway travels northwest for about a mile, passing the campus of Portland State University, to an interchange with the U.S. Route 26 freeway bound for the western suburbs of Portland. I-405 then travels north for just over a mile, forming the western edge of Downtown Portland. It runs mostly below grade through this area. At the north edge of downtown, as it approaches the Willamette River, I-405 reaches a Y interchange with U.S. Route 30. This interchange and the short freeway portion of U.S. 30 to which it connects were originally intended for the canceled I-505.

I-405 and U.S. 30 share alignment as they cross the Willamette River on the double-decker Fremont Bridge. At the northeastern end of the bridge is a partially completed stack interchange with Interstate 5; the canceled Rose City Freeway was to be a continuation of I-405, serving Portland International Airport and northeast Portland. Only a small stub portion of the Rose City Freeway was built, in order to provide a connection between the bridge and nearby Legacy Emanuel Hospital.

History

The earliest portion of Interstate 405 opened to traffic on February 25, 1969. The loop was completed in 1973 when the Fremont Bridge opened, linking I-405 to I-5 in North Portland. In August 2009 the entire route with the exception of the Fremont bridge was completely repaved for the first time after it opened to traffic. The bridge itself was repaved in August 2011.

In 1998, Mayor Vera Katz proposed capping a portion of the freeway in Downtown Portland with buildings and parks.

Exit list

The view southward from the NW Everett Street overpass.

Approaching the southern terminus from the Marquam Bridge.

The entire route is in Portland, Multnomah County.

mi	km	Exit	Destinations	Notes
−0.04	−0.064	—	I-5 south – Salem	Southern terminus; southbound exit and northbound entrance; I-5 north exit 299B; south no number signed
0.52	0.84	1A	South Waterfront – City Center	Northbound exit and southbound entrance
0.52	0.84	—	I-5 north to I-84 east – The Dalles, Seattle	Southbound exit and northbound entrance
0.89	1.43	1B	4th Avenue	Northbound exit and southbound entrance
1.03	1.66	1C	US 26 east / 6th Avenue – Ross Island Bridge	Southern end of US 26 concurrency
1.40	2.25	1D	12th Avenue	Northbound exit and southbound entrance
1.62	2.61	1D	US 26 west – Beaverton	Northern end of US 26 concurrency
1.92	3.09	2A	Salmon Street – Providence Park	Northbound exit and southbound entrance
2.20	3.54	2A	Burnside Street, Couch Street	Southbound exit and northbound entrance
2.35	3.78	2B	Everett Street
3.08	4.96	3	US 30 west – Northwest Industrial Area, St. Helens	Southern end of US 30 concurrency
3.78	6.08	—	US 30 east (I-5 south) – The Dalles	Northern end of US 30 concurrency; northbound exit and southbound entrance
4.18	6.73	—	Kerby Avenue	Northbound exit and southbound entrance
4.21	6.78	—	I-5 north – Seattle	Northern terminus; northbound exit and southbound entrance; I-5 exit 302B
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access

External links

Media related to at Wikimedia Commons