Federal Data

HPMS

Definition

Highway Performance Monitoring System. Federal dataset providing pavement conditions (IRI), traffic volume (AADT), and functional classification. Overlaid in the Helm for context.

In context

HPMS data gives a local agency a federal reference point for traffic volume and condition.

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Standards

FHWA HPMS

Federal Highway Administration Highway Performance Monitoring System. Requires state DOTs to report IRI, cracking percen…
Standards

FHWA

Federal Highway Administration. The federal agency responsible for highway infrastructure standards. Road Triage aligns …
Scoring

IRI

International Roughness Index. A standardized measure of road surface roughness in inches/mile. Available through Road T…
Platform

AADT

Annual Average Daily Traffic. The average number of vehicles using a road segment per day over a year. Helm can slice an…
Federal Data

DOT

Department of Transportation. The federal (USDOT) or state agency responsible for transportation infrastructure. Helm ov…
Federal Data

ACS

American Community Survey. The U.S. Census Bureau survey providing population, income, and commuting data. Helm uses ACS…