Interstate 405 (Oregon)

Interstate 405
Route information
Maintained by ODOT
Length:	4.25 mi[1] (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 Numbered Routes Named Highways ← OR 402 OR 410 →

Interstate 405 (I-405, also known as the Stadium Freeway No. 61^[2]) 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.

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.

Mile[1]	km	Exit	Destinations	Notes
-0.04	−0.06	—	I-5 south – Salem	Southbound exit and northbound entrance
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	South end of US 26 overlap
1.40	2.25	1D	12th Avenue	Northbound exit and southbound entrance
1.62	2.61	1D	US 26 west – Beaverton	North end of US 26 overlap
1.92	3.09	2A	Salmon Street – PGE 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	3A	US 30 west – Northwest Industrial Area, St. Helens	South end of US 30 overlap
3.78	6.08	3B	US 30 east (I-5 south) – The Dalles	North end of US 30 overlap; northbound exit and southbound entrance
4.18	6.73	4	Kerby Avenue	Northbound exit and southbound entrance
4.21	6.78	—	I-5 north – Seattle	Northbound exit and southbound entrance
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

External links

Media related to Interstate 405 (Oregon) at Wikimedia Commons

v t e Auxiliary routes of Interstate 5 California 105 1051 205 3054 405 505 605 805 9052 Oregon 105 205 3053 405 5053 Washington 205 405 6053 705 1Former 2Future 3Unbuilt 4Unsigned