Interstate 5

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Interstate 5 marker

Main route of the Interstate Highway System
Main • Auxiliary • Business

Interstate 5 (I-5) is the main Interstate Highway on the West Coast of the United States, largely parallel to the Pacific Ocean from Canada to Mexico (Washington to southernmost California, linking Baja California to British Columbia) and serving some of the largest cities of that part of the U.S., including Seattle, Tacoma, Portland, Sacramento, San Francisco/Oakland, Los Angeles, and San Diego. It links the state capital cities of Washington, Oregon, and California. Its southern end is at the United States - Mexico border. Its northern end is at the Canada-United States border. Interstate 5 is the only Interstate Highway to touch both the Canadian and Mexican borders. At its southern end, I-5 continues into Tijuana, Mexico, as Mexico Federal Highway 1. At its northern end, I-5 continues into Vancouver, British Columbia, Canada, as British Columbia Highway 99.

This highway links to control cities in California (San Diego, Santa Ana, Los Angeles, Oakland, San Francisco, Sacramento, Redding, Mount Shasta, Weed, and Yreka), Oregon (Ashland, Medford, Grants Pass, Roseburg, Eugene, Salem, and Portland), and Washington (Tacoma, Seattle, Everett, Mount Vernon, Bellingham). Vancouver, British Columbia (signed as "Vancouver B.C." to avoid confusion with Vancouver, Washington) is also a control city on Interstate 5 from the Seattle-Tacoma area to the northern terminus at the Canadian border.

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