Summary:
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Description from the original website
The Federal Highway Administration (FHWA) has been receiving Highway
inventory, usage, condition and performance data from State Departments of
Transportation (DOT) since 1978 to support the program mission of the FHWA.
Specifically, HPMS consists of detailed road segment data for
higher order systems, sample attributes for collector systems, and summary data
for the local roads.
States DOTs submit HPMS data annually to the FHWA following a prescribed format outlined in the HPMS Field Manual. New requirements for HPMS took effect in 2014 that required State DOTs
to expand their Linear Referencing Systems (LRS), a statewide
geospatial representation of their road system that includes all public
roads.
This requirement was put in place to support highway safety.
HPMS
public data consists of geospatial reference files and several tables
(County Summaries, Urban Summaries, Statewide Summaries, Non-Federal Aid
Summaries, and Roadway Sections). Also included in the HPMS public data
is the Sample Table. State Departments of Transportation provide these
data tables every June following the data year it represents.
Generally, these files will be available to the public by September,
after FHWA's review and acceptance of the data. The FHWA does not alter
the data provided by State DOTs other than removing data that fails
basic format violations.
The
following views of HPMS are intended to provide flexibility for different user
groups to effectively analyze the data in HPMS in the most efficient manner.
Comments
The HPMS data sets are split into three parts. This first part are geospatial data for the years of 2018 to 2024. The data sets are provided in geopackage (gpkg) format. The second part comprises the years 2011 to 2017 and are in shape file format. The third part are tabular data provided as CSV.
The Data Element Dictionary and the HPMS Field Manual are included for reference.