Interstate 405 (Oregon)

I-405
I-405
Stadium Freeway No. 61
Route information
	Auxiliary route of I-5
Length	4.25 mi (6.84 km)
Existed	1958[1]–present
NHS	Entire route
Major junctions
South end	I-5 in Portland
	US 26 in Portland; US 30 in Portland
North end	I-5 / US 30 in Portland
Location
Country	United States
State	Oregon
Counties	Multnomah
Highway system
	Interstate Highway System; Main; Auxiliary; Suffixed; Business; Future; Oregon Highways; Interstate; US; State; Named; Scenic;

Interstate 405 (I-405), also known as the Stadium Freeway No. 61,[2] is a short north–south Interstate Highway in Portland, Oregon. It forms a loop that travels around the west side of Downtown Portland.

References

"Correspondence, A. E. Johnson and W. C. Williams". American Association of State Highway Officials. November 10, 1958. pp. 2–3. Retrieved October 8, 2021 – via AASHTO Route Numbering Archive.
"2020 Cross Reference Table of Highway Route Number to State Highway Number" (PDF). Oregon Department of Transportation. 2020. p. 1. Retrieved October 28, 2021.

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[AASHTO-1958-1] "Correspondence, A. E. Johnson and W. C. Williams". American Association of State Highway Officials. November 10, 1958. pp. 2–3. Retrieved October 8, 2021 – via AASHTO Route Numbering Archive.

[ODOT-CrossRef-2] "2020 Cross Reference Table of Highway Route Number to State Highway Number" (PDF). Oregon Department of Transportation. 2020. p. 1. Retrieved October 28, 2021.