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Highway Information Seminar in Rosslyn, VA - November 17, 2004


Uses of IRI Data

Why IRI?

IRI Data Reporting Requirements:

Graph shoiwng % mils with IRI, 100% are Interstate rural, OPA rural, Minor Arterial rural, NHS, and STRAHNET. 99% are Interstate urban, Other Freeways and Expressways urban,Other Principal Arterials urban, and STRAHNET. 98% NHS urban.

Updating HPMS IRI

Updating HPMS IRI

Graphic illustration of difference between matched sample and matched universe techniques for indentifying IRI values.

Map showing HPMS interstate IRI Data for 2001 and 2003.

Improving HPMS IRI Reporting

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