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|direction_b=East |terminus_b= in Birmingham, AL |browse= }} Interstate 22 (I-22) is an Interstate highway that follows the U.S. Route 78 (US 78) corridor on a route from Memphis, Tennessee, to Birmingham, Alabama. I-22 indirectly connects I-240, I-40, I-55, and I-69 in the northwest with I-65 and I-20/I-59 in the southeast. Hence, I-22 helps form a freeway to connect downtown Atlanta with Birmingham, Memphis, Little Rock, Fort Smith, and Oklahoma City. Along its way through the two states, I-22 serves the towns of Jasper, Winfield, and Hamilton, Alabama and Fulton, Tupelo, New Albany, and Holly Springs, Mississippi. All portions of this highway were either built new or converted to Interstate Highway standards as of early 2011. A future interchange with I-269 near Byhalia, Mississippi is the western terminus of I-22. The eastern terminus is an interchange with I-65 near Birmingham. ==History== The part of I-22 just east of Fulton, Mississippi, was approved by Congress as "Corridor X" in 1978, as a part of the Appalachian Development Highway System, and parts of I-22 have been under construction ever since. Corridor X was also designated as "High Priority Corridor 10" in the Federal National Highway System Designation Act of 1995, and as "High Priority Corridor 45" in later legislation. I-22 now covers nearly the full distance between Birmingham and suburban Memphis, with the interchange at I-65 in Birmingham, Alabama opening on November 17, 2015. In Mississippi, I-22 runs from the Alabama state line across the state to I-269, the Memphis outer beltway, near Byhalia. This is about short of the Memphis city limits. While I-22 itself does not continue past I-269 to Memphis, some theorize that an I-22 spur route may be named along the existing US 78 from I-269 northward to the Tennessee state line, creating a better connection between Memphis and I-22. In 2004, Corridor X was designated as Future I-22 by Public Law Number 108-199, and the designation was made official on April 18, 2005. In Alabama and Mississippi, blue signs reading "FUTURE/I-22/CORRIDOR" at left and an ''I-22'' shield with "FUTURE" instead of "INTERSTATE" at the right were unveiled on April 18, 2005.〔 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 22」の詳細全文を読む スポンサード リンク
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