U.S Department of Transportation
Historic HPMS Data (Universe) - 1988
Historic Highway Performance Monitoring System universe data for the year 1988
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Updated Oct 25, 2026
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U.S Department of Transportation
Historic Highway Performance Monitoring System universe data for the year 1988
Updated Oct 25, 2026
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U.S Department of Transportation
Historic Highway Performance Monitoring System sample data for the year 1988
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Historic Highway Performance Monitoring System sample data for the year 1982
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Historic Highway Performance Monitoring System sample data for the year 1986
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Historic Highway Performance Monitoring System universe data for the year 1987
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Historic Highway Performance Monitoring System universe data for the year 1986
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Historic Highway Performance Monitoring System sample data for the year 1995
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Historic Highway Performance Monitoring System universe data for the year 1995
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U.S Department of Transportation
Historic Highway Performance Monitoring System universe data for the year 2002
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