Asphalt Definitions and Terms

Home Knowledge Base Asphalt Terms International Roughness Index

Categories

Categories

Tags

Tags

Aggregates APEX Asphalt Asphalt Unscripted Cold Weather Energy Fall Focus Fillers Fire Safety Heat Inside Access 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 TxDOT-TXAPA Awards underseal Warm Mix Asphalt Winter

Latest Posts

TxDOT Letting Report 2026 January

December 17, 2025

TxDOT Letting Report 2025 December

December 2, 2025

Inside Access November 2025

November 14, 2025

Holiday Fire Prevention

November 11, 2025

Carbon Monoxide

November 11, 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.