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|terminus_b= at Canadian border in Port Huron |counties=Branch, Calhoun, Eaton, Clinton, Shiawassee, Genesee, Lapeer, St. Clair |previous_type=M |previous_route=68 |next_type=M |next_route=69 }} Interstate 69 (I-69) is a part of the Interstate Highway System that will eventually run from the Mexican border in Texas to the Canadian border at Port Huron, Michigan. In Michigan, it is a state trunkline highway that enters the state south of Coldwater and passes the cities of Lansing and Flint in the Lower Peninsula. A north–south freeway from the Indiana–Michigan border to the Lansing area, it changes direction to east–west after running concurrently with I-96. The freeway continues to Port Huron before terminating in the middle of the twin-span Blue Water Bridge while running concurrently with I-94 at the border. There are four related business loops for I-69 in the state, connecting the freeway to adjacent cities. Predecessors to I-69 include the first M-29, US Highway 27 (US 27), M-78 and M-21. The freeway was not included on the original Interstate Highway System planning maps in the mid-1950s, but it was added in 1958 along a shorter route. Michigan built segments of freeway for the future Interstate in the 1960s, and the state was granted additional Interstate mileage in 1968 to extend I-69 north and east to Flint. Later extensions in 1973 and 1987 resulted in the modern highway. The first freeway segment designated as I-69 in Michigan opened in 1967, and the last was completed in 1992, finishing Michigan's Interstate System. US 27 previously ran concurrently with I-69 from the Indiana–Michigan state line north to the Lansing area, but this designation was removed in 2002. ==Route description== The entirety of I-69 is listed on the National Highway System, which is a network of roadways important to the country's economy, defense, and mobility. The freeway carries 91,100 vehicles on average each day between I-475 and M-54 in Flint and 14,085 vehicles between M-53 and Capac Road near the Lapeer–St. Clair county line, the highest and lowest traffic counts in 2012, respectively. I-69 carries the Lake Huron Circle Tour in the Port Huron area and the I-69 Recreational Heritage Route from the Indiana state line north to the Calhoun–Eaton county line.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Interstate 69 in Michigan」の詳細全文を読む スポンサード リンク
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