Asphalt Definitions and Terms

Home Knowledge Base Asphalt Terms International Roughness Index

Categories

Categories

Tags

Tags

Aggregates Asphalt Asphalt Unscripted Cold Weather Energy Fall Focus Fillers Fire Safety Heat Mix Design Optimize Series overlay Pavement pavement design Paving Safety Sealants Seal Coat Specifications Summer Technician Awards Texas Department of Transportation thinlay thin overlay TOM tools and downloads Troubleshooting TXAPA Awards TxDOT-TXAPA Awards underseal Warm Mix Asphalt Winter

Latest Posts

TxDOT Test Procedures Effective April 2025

April 28, 2025

TxDOT Letting Report 2025 May

April 25, 2025

Water Safety

April 14, 2025

Work Zone Awareness

April 14, 2025

TxDOT Letting Report 2025 April

March 31, 2025

Receive All The Latest News And Information From TXAPA

This field is for validation purposes and should be left unchanged.

International Roughness Index

International Roughness Index, or IRI, is used worldwide as a standard to quantify road surface roughness.