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Archive – Urban Mobility Reports: 1999-2005

CAUTION: Do not compare data or performance measures from two different reports to identify trends.

The methodology used for the Annual Mobility Reports and the data obtained from the Federal Highway Administration and the state Departments of Transportation have changed almost every year. The Report is a research effort; one goal is to provide the best estimate of congestion conditions and trends. As such there have been several different versions of the information. The most recent report always includes the best estimates. Data in previous reports may not match with current estimates and readers are cautioned to avoid comparing data or performance measures from two different reports to identify trends.

Some researchers have asked for access to previous reports, however, and we are happy to provide those. The links below provide you with information about the changes for particular years and the previous reports as they were published.

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