The Interstate Highways are the major interstate highways of the United States and are assigned with digit route number where Even numbers are assigned to east/west routes starting from the south to the north. The odd route numbers are assigned to north/south routes starting from the west toward the east.
Most Interstate highways are countrywide vehicular lane. However, exception to the rule exists as a few Interstate highways are located entirely within a State border.
|United States Interstate|
East-West Routes: I-8 | I-10 | I-20 | I-22 | I-24 | I-26 | I-30 | I-40 | I-44 | I-64 | I-66 | I-68 | I-70 | I-72 | I-74 | I-76 West | I-76 East | I-78 | I-80 | I-82 | I-84 East | I-84 West | I-86 East | I-90 | I-94
Intrastate: I-17 (Arizona) | I-19 (Arizona) | I-27 (Texas) | I-37 (Texas) | I-43 (Wisconsin) | I-45 (Texas) | I-49 (Louisiana) | I-73 (North Carolina) | I-87 (New York) | I-97 (Maryland) | I-99 (Pennsylvania) | I-4 (Florida) | I-12 (Louisiana) | I-16 (Georgia) | I-86 West (Idaho) | I-88 West (Illinois) | I-88 East (New York) | I-96 (Michigan)