Scoring

IRI

Definition

International Roughness Index. A standardized measure of road surface roughness in inches/mile. Available through Road Triage Enterprise Tier with SSI profiler integration (FHWA-certified).

In context

A low IRI means a smooth ride; a high IRI means a rough one.

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Equipment

Inertial Profiler

A vehicle-mounted device that measures road surface roughness (IRI) using accelerometers and lasers. Road Triage Enterpr…
Standards

ASTM E950

Standard Test Method for Measuring the Longitudinal Profile of Traveled Surfaces with an Accelerometer-Established Inert…
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AASHTO M328

Equipment specification for inertial profilers used to collect IRI data for federal HPMS reporting. SSI profiler hardwar…
Standards

FHWA HPMS

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

CCI

Cracking Condition Index (RT-CCI). A 0-100 score built primarily on ASTM E3303, computing aperture-weighted cracking ind…
Scoring

CDV

Corrected Deduct Value. An iterative correction procedure used in PCI calculation that accounts for the compounding effe…