Interstate 70

Interstate 70 (I-70) is a major east–west Interstate Highway in the United States that runs from I-15 near Cove Fort, Utah, to a park and ride lot just east of I-695 in Baltimore, Maryland. I-70 approximately traces the path of U.S. Route 40 (US 40, the old National Road) east of the Rocky Mountains. West of the Rockies, the route of I-70 was derived from multiple sources. The Interstate runs through or near many major cities, including Denver, Topeka, Kansas City, St. Louis, Indianapolis, Columbus, Pittsburgh, and Baltimore. The sections of the Interstate in Missouri and Kansas have laid claim to be the first Interstate in the United States. The Federal Highway Administration (FHWA) has claimed the section of I-70 through Glenwood Canyon, Colorado, completed in 1992, to be the last piece of the Interstate Highway System, as originally planned, to open to traffic. The construction of I-70 in Colorado and Utah is considered an engineering marvel, as the route passes through the Eisenhower Tunnel, Glenwood Canyon, and the San Rafael Swell. The Eisenhower Tunnel is the highest point along the Interstate Highway System, with an elevation of . |- |UT | |- |CO | |- |KS | |- |MO | |- |IL | |- |IN | |- |OH | |- |WV | |- |PA | |- |MD | |- |Total | |} Interstate 70 in Utah I-70 begins at an interchange with I-15 near Cove Fort. Heading east, I-70 crosses between the Tushar and Pahvant ranges via Clear Creek Canyon and descends into the Sevier Valley, where I-70 serves Richfield, the only town of more than a few hundred people along I-70's path in Utah. Upon leaving the valley near Salina, I-70 crosses the Salina Summit and then crosses a large geologic formation called the San Rafael Swell. Prior to the construction of I-70, the swell was inaccessible via paved roads and relatively undiscovered. Once this section was opened to traffic in 1970, it became the longest stretch of Interstate Highway with no services and the first highway in the US built over a completely new route since the Alaska Highway.

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