Interstate 5 North - DuPont to Tacoma

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Interstate 5
Interstate 5 North
The I-5 Mounts Road to Thorne Lane Interchange - Corridor Improvements project underway from July 2015 to December 2025 widens seven miles of I-5 from DuPont to Lakewood. Completed in September 2018, Stage 1 extended the northbound auxiliary lane from Mounts Road to the existing auxiliary lane beyond Center Drive (WSDOT, 2025).
The I-5 Mounts Road to Thorne Lane Interchange - Corridor Improvements project underway from July 2015 to December 2025 widens seven miles of I-5 from DuPont to Lakewood. Completed in September 2018, Stage 1 extended the northbound auxiliary lane from Mounts Road to the existing auxiliary lane beyond Center Drive (WSDOT, 2025).
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Stage 3 construction from 2023 to 2026 replaces the diamond interchange with at Exit 119 with a new half diverging diamond interchange joining I-5 with a realignment of DuPont-Stellacoom Road spanning the adjacent UP Railroad to a new roundabout (WSDOT, 2025).
Stage 3 construction from 2023 to 2026 replaces the diamond interchange with at Exit 119 with a new half diverging diamond interchange joining I-5 with a realignment of DuPont-Stellacoom Road spanning the adjacent UP Railroad to a new roundabout (WSDOT, 2025).
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Costing $243 million, Stage 2 construction, from Steilacoom-DuPont Road to Thorne Lane, added a new HOV lane in each direction of Interstate 5. Work ran from Fall 2018 to substantial completion in September 2021 (WSDOT, 2024).
Costing $243 million, Stage 2 construction, from Steilacoom-DuPont Road to Thorne Lane, added a new HOV lane in each direction of Interstate 5. Work ran from Fall 2018 to substantial completion in September 2021 (WSDOT, 2024).
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A c/d roadway separates from I-5 north for the cloverleaf interchange (Exits 120 A/B) with 41st Division Drive to Joint Base Lewis-McChord (JBLM).
A c/d roadway separates from I-5 north for the cloverleaf interchange (Exits 120 A/B) with 41st Division Drive to Joint Base Lewis-McChord (JBLM).
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Captain Meriwether Lewis Memorial Park is adjacent to the JBLM Visitors Center, located just south of Exit 120 A and ahead of the JBLM Main Gate.
Captain Meriwether Lewis Memorial Park is adjacent to the JBLM Visitors Center, located just south of Exit 120 A and ahead of the JBLM Main Gate.
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SR 512 is a freeway bypassing Tacoma 12.06 miles east from Exit 127 to the freeway along SR 167 north of Puyallup.
SR 512 is a freeway bypassing Tacoma 12.06 miles east from Exit 127 to the freeway along SR 167 north of Puyallup.
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The west end of SR 512 ties into S Tacoma Way (Old U.S. 99/410) adjacent to the three quarter cloverleaf interchange with Interstate 5.
The west end of SR 512 ties into S Tacoma Way (Old U.S. 99/410) adjacent to the three quarter cloverleaf interchange with Interstate 5.
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One of the projects completed during the 2000 to 2022 I-5 - SR 16 Tacoma/Pierce County HOV Program was the reconstruction of the Nalley Valley Interchange. Started in 2008, work completed in stages in 2011, 2014 and December 2019 upgraded the exchange with new high-speed ramps, flyovers, and HOV connections. Adjacent work along SR 16 replaced the Nalley Valley Viaduct, which dated back to 1971, to accommodate a wider freeway and HOV facilities (WSDOT, 2022).
One of the projects completed during the 2000 to 2022 I-5 - SR 16 Tacoma/Pierce County HOV Program was the reconstruction of the Nalley Valley Interchange. Started in 2008, work completed in stages in 2011, 2014 and December 2019 upgraded the exchange with new high-speed ramps, flyovers, and HOV connections. Adjacent work along SR 16 replaced the Nalley Valley Viaduct, which dated back to 1971, to accommodate a wider freeway and HOV facilities (WSDOT, 2022).
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I-5 - SR 16 Tacoma/Pierce County HOV Program construction expanded I-5 to four roadways between SR 16 and the south end of I-705. Exit 132 departs as a c/d roadway for 38th Street, SR 16 and I-705/SR 7.
I-5 - SR 16 Tacoma/Pierce County HOV Program construction expanded I-5 to four roadways between SR 16 and the south end of I-705. Exit 132 departs as a c/d roadway for 38th Street, SR 16 and I-705/SR 7.
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Formerly a full cloverleaf interchange, the loop ramps joining 38th Street with I-5 were removed to eliminate weaving traffic at Exit 132.
Formerly a full cloverleaf interchange, the loop ramps joining 38th Street with I-5 were removed to eliminate weaving traffic at Exit 132.
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Interstate 705, the Tacoma Spur, extends 1.50 miles north from SR 7 at Exit 133 to Downtown Tacoma and Schuster Parkway along Commencement Bay.
Interstate 705, the Tacoma Spur, extends 1.50 miles north from SR 7 at Exit 133 to Downtown Tacoma and Schuster Parkway along Commencement Bay.
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SR 16 travels west along a freeway from the systems interchange with I-5 to the Tacoma Narrows Bridge and Gig Harbor.
SR 16 travels west along a freeway from the systems interchange with I-5 to the Tacoma Narrows Bridge and Gig Harbor.
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The systems interchange (Exit 133) connecting I-5 with Interstate 705 north and SR 7 south was constructed by 1988.
The systems interchange (Exit 133) connecting I-5 with Interstate 705 north and SR 7 south was constructed by 1988.
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Continuing north from 38th Street, the c/d roadway from Exit 132 separates with ramps for SR 16 west to Bremerton and Exit 133 to I-705/SR 7.
Continuing north from 38th Street, the c/d roadway from Exit 132 separates with ramps for SR 16 west to Bremerton and Exit 133 to I-705/SR 7.
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Two lanes depart for Exit 133 to I-705/SR 7 from within the exchange linking I-5/SR 16.
Two lanes depart for Exit 133 to I-705/SR 7 from within the exchange linking I-5/SR 16.
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SR 7 initially follows a freeway spur south from I-705 through Tacoma Eastern Gulch to a partially built cloverleaf interchange with 38th Street.
SR 7 initially follows a freeway spur south from I-705 through Tacoma Eastern Gulch to a partially built cloverleaf interchange with 38th Street.
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Ramps from the east end of SR 16 and the c/d roadway at Exit 132 combine with the ramp from Exit 133 ahead of Interstate 705.
Ramps from the east end of SR 16 and the c/d roadway at Exit 132 combine with the ramp from Exit 133 ahead of Interstate 705.
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The Tacoma Dome is located east of I-705 off E 26th Street.
The Tacoma Dome is located east of I-705 off E 26th Street.
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The c/d roadway from Exit 132 returns to the Interstate 5 mainline at the S Yakima Avenue overpass.
The c/d roadway from Exit 132 returns to the Interstate 5 mainline at the S Yakima Avenue overpass.
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I-5 advances east to a split diamond interchange (Exit 134) with Portland Avenue just beyond the Tacoma city limits within the Puyallup Reservation.
I-5 advances east to a split diamond interchange (Exit 134) with Portland Avenue just beyond the Tacoma city limits within the Puyallup Reservation.
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Portland Avenue heads north along the Puyallup River to the Port of Tacoma area and through residential areas of southeast Tacoma to SR 512 near Midland.
Portland Avenue heads north along the Puyallup River to the Port of Tacoma area and through residential areas of southeast Tacoma to SR 512 near Midland.
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Interstate 5 confirming marker posted next to McKinley Park in Tacoma.
Interstate 5 confirming marker posted next to McKinley Park in Tacoma.
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Exit 134 leaves Interstate 5 north at the L Street overpass for E 28th Street to Portland Avenue. 28th Street also connects with the wye interchange (Exit 135) where SR 167 eastbound begins.
Exit 134 leaves Interstate 5 north at the L Street overpass for E 28th Street to Portland Avenue. 28th Street also connects with the wye interchange (Exit 135) where SR 167 eastbound begins.
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SR 167 (River Road) runs along the Puyallup River southeast to SR 161, where it dog legs north onto a freeway 6.50 miles from I-5. SR 167 heads north through Sumner, Auburn and Kent. The state route travels 28.6 miles between Tacoma and Renton, 19.26 miles of it along freeway.
SR 167 (River Road) runs along the Puyallup River southeast to SR 161, where it dog legs north onto a freeway 6.50 miles from I-5. SR 167 heads north through Sumner, Auburn and Kent. The state route travels 28.6 miles between Tacoma and Renton, 19.26 miles of it along freeway.
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2015 to 2018 road work widening I-5 for the eventual HOV lanes realigned northbound I-5 onto a new bridge spanning the Puyallup River. This previous span dated back to 1962 (WSDOT, 2021).
2015 to 2018 road work widening I-5 for the eventual HOV lanes realigned northbound I-5 onto a new bridge spanning the Puyallup River. This previous span dated back to 1962 (WSDOT, 2021).
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Exit 136 A joins Port of Tacoma Road south to parallel 20th Street E. 20th Street leads east by a series of warehouses in Fife.
Exit 136 A joins Port of Tacoma Road south to parallel 20th Street E. 20th Street leads east by a series of warehouses in Fife.
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A loop ramp onto Port of Tacoma Road north follows at Exit 136 B. Port of Tacoma Road intersects Pacific Highway (Old U.S. 99) just north of Interstate 5 ahead of SR 509 and the Port of Tacoma.
A loop ramp onto Port of Tacoma Road north follows at Exit 136 B. Port of Tacoma Road intersects Pacific Highway (Old U.S. 99) just north of Interstate 5 ahead of SR 509 and the Port of Tacoma.
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Continuing east across Fife, Interstate 5 spans Wapato Creek ahead of the six-ramp parclo interchange (Exit 137) with 54th Avenue E and the northbound beginning of SR 99.
Continuing east across Fife, Interstate 5 spans Wapato Creek ahead of the six-ramp parclo interchange (Exit 137) with 54th Avenue E and the northbound beginning of SR 99.
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South from Exit 137, 54th Avenue E curves onto Valley Road southeast to North Puyallup. SR 99 north joins Pacific Highway east from 54th Avenue E nearby. Turning north, state route parallels I-5 through west Milton into Federal Way in King County.
South from Exit 137, 54th Avenue E curves onto Valley Road southeast to North Puyallup. SR 99 north joins Pacific Highway east from 54th Avenue E nearby. Turning north, state route parallels I-5 through west Milton into Federal Way in King County.
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Part of the Puget Sound Gateway Program constructs a new freeway joining SR 509 with Interstate 5 from the north and with SR 167 to the south. Work on the final two miles of SR 509 got underway in 2024 and runs through 2029. The last of the three stages building SR 167 is scheduled to open in 2029 (WSDOT, 2025).
Part of the Puget Sound Gateway Program constructs a new freeway joining SR 509 with Interstate 5 from the north and with SR 167 to the south. Work on the final two miles of SR 509 got underway in 2024 and runs through 2029. The last of the three stages building SR 167 is scheduled to open in 2029 (WSDOT, 2025).
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Interstate 5 curves north through Milton ahead of a weigh station in Federal Way.
Interstate 5 curves north through Milton ahead of a weigh station in Federal Way.
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The SeaTac Rest Area lies adjacent to the northbound weigh station.
The SeaTac Rest Area lies adjacent to the northbound weigh station.
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References:

Washington State Department of Transportation (WSDOT). (2025, April 4). I-5 - Mounts Rd. to Center Dr. - Auxiliary Lane Extension - Complete September 2018. WSDOT. https://wsdot.wa.gov/construction-planning/search-projects/i-5-mounts-rd-center-dr-auxiliary-lane-extension-complete-september-2018

Washington State Department of Transportation (WSDOT). (2025, August 19). I-5 - Mounts Rd. to Steilacoom-DuPont Rd. - Corridor Improvements. WSDOT. https://wsdot.wa.gov/construction-planning/search-projects/i-5-mounts-rd-steilacoom-dupont-rd-corridor-improvements

Washington State Department of Transportation (WSDOT). (2024, December 16). I-5 - Steilacoom-DuPont Rd. to Thorne Lane - Corridor Improvements - Complete September 2021. WSDOT. https://wsdot.wa.gov/construction-planning/search-projects/i-5-steilacoom-dupont-rd-thorne-lane-corridor-improvements

Washington State Department of Transportation (WSDOT). (2022, April 19). I-5 - SR 16 Realignment - HOV Structure and Connections - Complete December 2019. WSDOT. https://wsdot.wa.gov/construction-planning/search-projects/i-5-sr-16-realignment-hov-structure-and-connections-complete-december-2019

Washington State Department of Transportation (WSDOT). (2021, December 1). I-5 - Portland Avenue to Port of Tacoma Road - Northbound HOV - Complete November 2018. WSDOT. https://wsdot.wa.gov/construction-planning/search-projects/i-5-portland-avenue-port-tacoma-road-northbound-hov-complete-november-2018

Washington State Department of Transportation (WSDOT). (2025, July 11). Puget Sound Gateway Program. WSDOT. https://wsdot.wa.gov/construction-planning/major-projects/puget-sound-gateway-program

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Interstate 705Interstate 705
Washington State Route 16State Route 16

Page Updated Thursday September 04, 2025.