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: The state's planned toll superhighway in the Seattle area was shelved in favor of a federally-funded freeway under the new Interstate Highway System, under which I-5 was created in 1957. Construction of I-5 was completed in 1969, and several segments of the highway have been widened or improved in the decades since. Contents
1 Route description
1.1 Southwestern Washington
1.2 South Sound region
1.3 Seattle and Shoreline
1.4 Snohomish County
1.5 Skagit and Whatcom counties
2 Seattle express lanes
2.1 Express lane exit list
3 History
3.1 Early state and national highways
3.2 State upgrades and Interstate planning
3.3 Suburban and rural construction
3.4 Seattle planning and construction
3.5 Major projects and expansions
3.6 Incidents and closures
3.7 Future projects and proposals
4 Exit list
5 References
6 External links
Route description
Interstate 5 is the only Interstate to traverse Washington from north to south, serving as the primary highway for the western portion of the state. It is listed as part of the National Highway System and the state's Highways of Statewide Significance program, recognizing its connection to major communities. I-5 has three auxiliary Interstate Highways within Washington: I-205, an easterly bypass of Portland, Oregon, and Vancouver; I-405, bypassing Seattle via the Eastside; and I-705, a short spur into Tacoma. It was designated as the Purple Heart Trail in 2013 by the Washington State Transportation Commission to honor wounded military veterans. The freeway runs through the most densely populated region of Washington state, with 4.6 million people living in the nine counties on the corridor, approximately 70 percent of the state's population.