Interstate Isohighwaynumbric Map of the Continental United States

UPDATE: A rework of this map is now available on wywing.

The United States interstate highway system generally has odd numbered North-South highways increasing in highway number from West to East, and even numbered West-East highways increasing in highway number from South to North. In the following map of the United States, the map distance is scaled not with physical distance but with interstate highway numbers. Thus, in the following map, all cities on the North-South Interstate 25, for example, are on the same vertical line. Note that there are exceptions to the numbering system of United States highways, as well as occasions when highways cross to the other side of a parallel highway, especially in the Eastern half of the United States. In each of these cases, a topological anomaly occurs.

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