![Measuring instruments / Technology / Profilograph / Pavement engineering / International Roughness Index / Road Measuring instruments / Technology / Profilograph / Pavement engineering / International Roughness Index / Road](https://www.pdfsearch.io/img/a59d32493f2b839b301d5596f949f0c3.jpg) Date: 2007-06-14 11:48:24Measuring instruments Technology Profilograph Pavement engineering International Roughness Index Road | | Explanation of Terms IRI – International Roughness Index • Measurement of the number of vertical deviations over a section of road. • (i.e. inches/mile) • Perfect is a “0” HC IRI – Half-Car IRIAdd to Reading ListSource URL: www.tdot.state.tn.usDownload Document from Source Website File Size: 22,81 KBShare Document on Facebook
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