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HPMS IRI

HPMS IRI. Highway Information Seminar Rosslyn, VA November 17, 2004. HPMS IRI Data. Uses of IRI Data Why IRI? HPMS IRI observations Improving IRI. Uses of IRI Data. National pavement needs Status of the Nation’s Highways, Bridges, and Transit: Conditions & Performance

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HPMS IRI

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  1. HPMS IRI Highway Information Seminar Rosslyn, VA November 17, 2004

  2. HPMS IRI Data • Uses of IRI Data • Why IRI? • HPMS IRI observations • Improving IRI

  3. Uses of IRI Data • National pavement needs • Status of the Nation’s Highways, Bridges, and Transit: Conditions & Performance • Performance of the NHS • Above uses can be referenced at: www.fhwa.dot.gov • Performance of the STRAHNET • Other studies

  4. Why IRI? • Objective • Instrument-based • Science-based • Easily measured

  5. IRI Data Reporting Requirements: • All Interstate sections • All Freeway and Other Principal Arterial sections • All rural minor arterial sample sections • All NHS sections • All STRAHNET sections

  6. Rural Urban non-Interstate non-Interstate Highway System (2003)

  7. Updating HPMS IRI • Equal IRI values over time • Matched sample analysis • Programmatically matches sections over time • Conservative estimate of severity • GIS analysis • Map-based matching of sections over time • Utilizes NHPN GIS files with HPMS data • Closer estimate of severity

  8. Updating HPMS IRI • Equal IRI values over time • Data not being collected/reported • Data collected but not reported • Translation error/technical difficulties • Requires communication and action to resolve

  9. Sample “123ABC” 2003 IRI=98 in/mi Sample “456DEF” 2001 IRI=98 in/mi IRI=102 in/mi Etc… IRI=98 in/mi IRI=90 in/mi 2003 IRI=124 in/mi IRI=98 in/mi 2001 IRI=133 in/mi IRI=98 in/mi IRI=124 in/mi IRI=98 in/mi Etc… IRI=133 in/mi

  10. Improving HPMS IRI Reporting • AASHTO PP 37-02 (new -04) • HPMS Field Manual • Appendix E (see above) • HPMS CBT • 2-year reporting cycle • Documented procedures • QA/QC program / CPI model • Link HPMS to PMS

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