Title: Interstate 5 in Washington - Wikipedia
Headings: Interstate 5 in Washington
Interstate 5 in Washington
From Wikipedia, the free encyclopedia
Contents
Route description
Southwestern Washington
South Sound region
Seattle and Shoreline
Snohomish County
Skagit and Whatcom counties
Seattle express lanes
Express lane exit list
History
Early state and national highways
State upgrades and Interstate planning
Suburban and rural construction
Seattle planning and construction
Major projects and expansions
Incidents and closures
Future projects and proposals
Exit list
References
External links

Content: Interstate 5 in Washington - Wikipedia
Interstate 5 in Washington
From Wikipedia, the free encyclopedia
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Interstate highway in Washington
"WA 5" redirects here. WA 5 may also refer to Washington's 5th congressional district. This article is about the section of Interstate 5 in Washington. For the entire route, see Interstate 5. Interstate 5
Purple Heart Trail
A map of Western Washington with I-5 highlighted in red
Route information
Defined by RCW 47.17.020
Maintained by WSDOT
Length
276.62 mi (445.18 km)
Existed
August 14, 1957 –present
History
Completed in 1969
Tourist
routes
Cascade Loop Scenic Byway
Lewis and Clark Trail Scenic Byway
Skagit Valley Agricultural Scenic Corridor
Major junctions
South end
I-5 at Oregon state line in Vancouver

I-205 in Salmon Creek
US 12 near Centralia
US 101 in Tumwater
SR 16 in Tacoma
I-405 / SR 518 in Tukwila
I-90 in Seattle
SR 520 in Seattle
I-405 / SR 525 in Lynnwood
US 2 in Everett
SR 20 in Burlington
North end
Hwy 99 at Canadian border in Blaine
Location
Counties
Clark, Cowlitz, Lewis, Thurston, Pierce, King, Snohomish, Skagit, Whatcom

Highway system
Interstate Highway System
Main
Auxiliary
Suffixed
Business
Future
State highways in Washington
Interstate
US
State
Scenic
Former PSH
1964 renumbering
Former
← SR 4

→ SR 6
Interstate 5 ( I-5) is an Interstate Highway on the West Coast of the United States, serving as the region's primary north–south route. It travels 277 miles (446 km) across the state of Washington, running from the Oregon state border at Vancouver, through the Puget Sound region, and to the Canadian border at Blaine. Within the Seattle metropolitan area, the freeway connects the cities of Tacoma, Seattle, and Everett . I-5 is the only interstate to traverse the whole state from north to south and is Washington's busiest highway, with an average of 274,000 vehicles traveling on it through Downtown Seattle on a typical day. The segment in Downtown Seattle is also among the widest freeways in the United States, at 13 lanes, and includes a set of express lanes that reverse direction depending on time of the day. Most of the freeway is four lanes in rural areas and six to eight lanes in suburban areas, utilizing a set of high-occupancy vehicle lanes in the latter.