The US Interstate Highway System: 40 Year Report

http://www.publicpurpose.com/freeway1.htm

Michigan 120 4,200 0.47 Minnesota 80 2,500 0.63 Mississippi 105 3,500 1.46 Missouri 190 6,400 1.33 Montana 50 1,700 2.27 Nebraska 30 1,100 0.72 Nevada 80 1,600 2.13 New Hampshire

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