Interstate 5 (I-5) - Traversing Washington North-South
I-5's Southern most part in Washington State is in Vancouver and its northern most part is the border with Canada at Blaine, WA. I-5 is a six lane highway.
Major cities along the I-5 include Bellingham, Blaine, Centralia, Chehalis, Everett, Kelso, Mount Vernon, Olympia, Renton, Seattle, Shoreline, Tacoma, Tumwater and Vancouver.
Proceeding North from Portland, Interstate-5 takes a driver on a bridge over the Columbia River to enter Washington State. The Interstate is a very interesting one to travel with drivers passing through rural towns, forested land, urban sprawl, major cities such as Olympia, Seattle and Everett and stunning views of Mount Rainier, Mount St. Helens, the Puget Sound, the Capitol Dome and the iconic Space Needle in Seattle along the way.
The most densely driven sections of Interstate-5 are from Seattle to Tacoma with a lot of commuter traffic traveling from the communities of Tukwila, Des Moines and Federal Way.
The Washington State Department of Transportation provides webcams and internet data regarding traffic, roadway conditions and safety alerts.