IRI Data and the HPMS

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IRI Data and the HPMS

• RPUG
• Austin, TX
• October 28, 2003

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IRI Data and the HPMS

• Uses of IRI Data
• Why IRI?
• Reporting statistics
• Future use
• Improving IRI

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Uses of IRI Data

• National pavement needs
• Performance of the NHS
• Performance of the STRAHNET
• Other studies

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Percent NHS Miles by Pavement Condition
(FY1996-FY2001)
Source Highway Performance Monitoring System.
Available at http//intra.fhwa.dot.gov/ohpi/iripa
ge.htm.
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Why IRI?

• Objective
• Instrument-based
• Science backed
• Easily measured

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IRI Data Required For

• All Interstate sections
• All Freeway and Other Principal Arterial sections
• All rural minor arterial sample sections
• All NHS sections
• All STRAHNET sections

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non-Interstate
non-Interstate
Highway System
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Future Use

• National pavement needs
• Performance of the NHS
• Performance of the STRAHNET
• Other studies

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Improving IRI

• AASHTO PP 37-02
• HPMS Field Manual Appendix E
• Written procedures
• QA/QC program
• Link HPMS to PMS