Interstate 405 (Oregon)

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Interstate 405 Auxiliary route of the Interstate Highway System
Length:	4.25 mi[1] (6.84 km)
Formed:	1950s
South end:	I-5 in Portland
Major junctions:	US 26 in Portland US 30 in Portland
North end:	I-5/US 30 in Portland
Oregon highways (lists: Routes - Highways) < OR 402 OR 410 >

Interstate 405 (abbreviated 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.

Contents 1 Route description 2 History 3 Exit list 4 References

[edit] 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.

[edit] 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.

[edit] Exit list

The entire route is in Portland, Multnomah County.

Mile[1]	#	Destinations	Notes
-0.04		I-5 south – Salem	Southbound exit and northbound entrance
0.52	1A	Naito Parkway – Japanese-American Historical Plaza	Northbound exit and southbound entrance
0.52		I-5 north to I-84 east – The Dalles, Seattle	Southbound exit and northbound entrance
0.89	1B	4th Avenue	Northbound exit and southbound entrance
1.03	1C	US 26 east / 6th Avenue – Ross Island Bridge	South end of US 26 overlap
1.40	1D	12th Avenue	Northbound exit and southbound entrance
1.62	1D	US 26 west – Beaverton	North end of US 26 overlap
1.92	2A	Salmon Street – PGE Park	Northbound exit and southbound entrance
2.20	2A	Burnside Street, Couch Street	Southbound exit and northbound entrance
2.35	2B	Everett Street
3.08	3	US 30 west – Northwest Industrial Area, St. Helens	South end of US 30 overlap
3.78		US 30 east (I-5 south) – The Dalles	North end of US 30 overlap; northbound exit and southbound entrance
4.18		Kerby Avenue	Northbound exit and southbound entrance
4.21		I-5 north – Seattle	Northbound exit and southbound entrance

[edit] References

v • d • e Auxiliary routes of Interstate 5 California: 105 • 105 (former) • 205 • 305 (unsigned) • 405 • 505 • 605 • 805 • 905 (future) — Oregon: 105 • 205 • 305 (unbuilt) • 405 • 505 (unbuilt) — Washington: 205 • 405 • 605 (proposed) • 705