The US Interstate Highway System: 40 Year Reporthttp://www.publicpurpose.com/freeway1.htm
Louisiana 5,900 172,000 Lafayette + Lake Charles 4.4% Maine 1,700 50,000 Bangor + Waterville 4.6% Maryland 10,500 281,000 Howard County + Annapolis 6.9% Massachusetts 5,000 151,00
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