Interstate 105 Oregon

Overview

Interstate 105 connects Oregon Route 99 outside Downtown Eugene with I-5 and Oregon Route 126 (Eugene-Springfield Highway) at the Springfield city line. Following an L-shaped course, I-105 leads north from ramps with the couplets of 6th/7th Avenues and Jefferson/Washington Streets, where OR 99, OR 126 and OR 126 Business converge. The Washington-Jefferson Bridge spans the Willamette River into the trumpet interchange (Exit 1) with Delta Highway. I-105/OR 126 (Pacific-Willamette Highway) turn east from there to Coburg Road and I-5.

History

Construction for Interstate 105 in Eugene, including the Washington-Jefferson Bridge started in the early 1960s. The freeway fully opened to traffic in 1970 without controversy, unlike the other proposed Interstate spurs in Oregon that were never built (I-305 and I-505).¹

Costing $15 million, road construction (project #10349) in 2005 expanded Interstate 105 with auxiliary lanes in both directions between mileposts 0.89 to 3.95.²

Route Information

East End – Springfield, OR
West End – Eugene, OR
Mileage – 3.49
Cities – Eugene, Springfield
Junctions –

Source: December 31, 2021 Interstate Route Log and Finders List

I-105 Annual Average Daily Traffic (AADT)

Source: 2017 Transportation Volume Tables – Oregon Department of Transportation (ODOT)

Highway Guides

Interstate 105

East End – Springfield, Oregon

East at

I-105/OR 126 advance one mile east from the interchange with Coburg Road to Exits 4A/B for Interstate 5. Photo by Eric Stuve (07/28/10).

Interstate 105 passes north of Autzen Stadium and the Harlow neighborhood in Eugene ahead of I-5. Photo by Peter Johnson (09/16/20).

Eastbound Interstate 105 and OR 126 reach Exit 4A for I-5 south to Roseburg. Photo by Eric Stuve (07/28/10).

Left Exit 4B connects with I-5 north to Salem, Portland and Seattle, Washington. OR 126 continues east with two lanes into the city of Springfield. Photo by Eric Stuve (07/28/10).

West at

Westbound OR 126 (Eugene-Springfield Highway) navigates through an S-curve at the exchange with Pioneer Parkway ahead of I-5 (Exit 4) and I-105. 04/01/05

Exit 4B departs OR 126 north to Albany and Portland as Interstate 105 westbound begins. 04/01/05

Left Exit 4A follows from Interstate 105 and OR 126 (Eugene-Springfield Highway) west to I-5 south for Roseburg, Medford and Grants Pass. 04/01/05

North at

A wye interchange (Exit 192) connects Interstate 5 north with OR 99/126 Business to the University of Oregon 1.25 miles south of I-105 west and OR 126. Photo by Doug Kerr (07/31/11).

Interstate 5 crosses the Willamette River north a half mile from the exchange (Exit 194) with I-105 west and OR 126. Photo by Eric Stuve (07/28/10).

Exit 194A departs Interstate 5 north for OR 126 east to Springfield. OR 126 extends extends 5.5 miles east along a freeway from I-5/105 to 52nd Street. Photo by Eric Stuve (07/28/10).

OR 126 overlaps with Interstate 105 west to OR 99 in Downtown. The state route continues west from Eugene to Florence and U.S. 101 near the Pacific coastline. Photo by Doug Kerr (05/17/13).

South at

Construction underway in 2014-15 reconfigured the exchange with OR 569 (Randy Papé Beltline) west and Beltline Road east. I-5 proceeds one mile south to Exit 195 with I-105 and OR 126. Photo by Doug Kerr (07/31/11).

Entering the directional cloverleaf interchange (Exit 194) with I-105/OR 126 west to Eugene and OR 126 east to Springfield on I-5 southbound. Photo by Doug Kerr (07/31/11).

West End – Eugene, Oregon

West at

I-105/OR 126 run along the north side of the Willamette River to a trumpet interchange (Exit 1) with Delta Highway. Delta Highway is a freeway leading north to OR 569 (Randy Papé Beltline). Photo by Doug Kerr (09/07/09).

I-105/OR 126 turn south from Delta Highway across the Washington-Jefferson Bridge over the Willamette River. The final exit departs in one half mile for the continuation of OR 126 west along 6th Avenue (OR 99 north). 04/01/05

Approaching the couplet of OR 99 along 6th and 7th Avenues, I-105/OR 126 elevate along a viaduct system to the northwest of Downtown Eugene. Photo by Peter Johnson (09/16/20).

OR 99/126 Business overlap along 7th Avenue east through Downtown Eugene, while OR 99/126 combine northwest toward Florence and Junction City. 04/01/05

I-105 lowers to a signalized intersection with OR 99 (7th Avenue) at Jefferson Street. Jefferson Street continues south toward the Lane County Fairgrounds. Photo by Peter Johnson (09/16/20).

South East / 7th Avenue at

OR 99-126 (7th Avenue) east approach the couplet of Jefferson and Washington Streets where Interstate 105 eastbound begins. 04/01/05

OR 126 turns north alongside I-105 to cross the Willamette River en route to Springfield via Eugene-Springfield Highway. OR 99 continues east along 7th Avenue into Downtown Eugene. 04/01/05

North West / 6th Avenue at

OR 99/126 Business follow 6th Avenue west from Coburg Road through the Eugene city center. I-105 branches north from 6th Avenue three blocks beyond Olive Street here. 04/01/05

Forthcoming I-105 leads north to Delta Highway at Valley River Center mall. A direct ramp to the Washington-Jefferson Bridge along I-105/OR 126 departs from 6th Avenue west at Lawrence Street. Photo by Eric Stuve (07/28/10).

OR 126 Business ends just beyond I-105/OR 126 (Washington-Jefferson Bridge) at Madison Street. Photo by Eric Stuve (07/28/10).

Washington Street – North at

Washington Street intersects OR 99/126 Business (7th Avenue) eastbound at the ramp for I-105 and OR 126 a block and a half beyond this overhead assembly. 04/01/05

Washington Street partitions with the northbound beginning of Interstate 105 at 7th Avenue (OR 99 south / OR 126 Business east). 04/01/05

Sources:

Interstate 50th Anniversary: The Story of Oregon’s Interstates.
~~http://egov.oregon.gov/ODOT/HWY/GEOENVIRONMENTAL/ docs/Historic_Bridge/Willamette_Fremont_Bridge.doc~~

Page updated November 6, 2020.