How do they number those interstates?

The Answer Man navigates the complexities of the U.S. interstate highway numbering system, including why there is no Interstate 50. The answer to that one runs right through the heart of the metro-east area in Illinois.
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The Answer Man navigates the complexities of the U.S. interstate highway numbering system, including why there is no Interstate 50. The answer to that one runs right through the heart of the metro-east area in Illinois.