The HPMS is a national level highway information system that includes data on the extent, condition, performance, use and operating characteristics of the nation's highways. The HPMS contains administrative and extent of system information on all public roads, while information on other characteristics is represented in HPMS as a mix of universe and sample data for arterial and collector functional systems. Limited information on travel and paved miles is included in summary form for the lowest functional systems.
HPMS was developed in 1978 as a continuing database, replacing the special biennial
condition studies that had been conducted since 1965. The HPMS has been modified
several times since its inception. Changes have been made to reflect changes in
the highway systems, legislation, and national priorities, to reflect new technology,
and to consolidate or streamline reporting requirements.
Highway Functional Classification: Concepts, Criteria and Procedures
Updated Guidance for the Functional Classification of Highways