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City of Houston Street Surface Assessment Vehicle

City of Houston Street Surface Assessment Vehicle . Presented to the Flooding & Drainage Committee Eric K. Dargan – Deputy Director. Pavement Assessments for Roadways in the City of Houston. Pavement Condition Rating (PCR) Usage of PCR scores

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City of Houston Street Surface Assessment Vehicle

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  1. City of Houston Street Surface Assessment Vehicle Presented to the Flooding & Drainage Committee Eric K. Dargan – Deputy Director

  2. Pavement Assessments for Roadways in the City of Houston • Pavement Condition Rating (PCR) • Usage of PCR scores • 1999-2001 IMMP (Infrastructure Maintenance Management Program)

  3. Typical Roadway Problems RUTTING ALLIGATOR CRACKING RAVELLING TRANSVERSE CRACKING

  4. Typical Roadway Problems LONGITUDINAL CRACKING CONCRETE CRACKS JOINT SEAL SLAB REPLACEMENT

  5. IMMP • IMMP program – Evaluated by individuals • IMMP PCR Score Factors: • Flushing • Surface Deterioration • Faulting • Slab cracking* • Slab Replacements* • Ride Condition • (*concrete only) • Rutting • Raveling • Alligator Cracking • Transverse Cracking • Longitudinal Cracking • Joint Seal Present • Patching

  6. Overview of the Street Surface Assessment Vehicle (SSAV) • Procured from Idea Integration, Inc. in August 2008 • Data testing began July 2009 • Full production began May 2010 • Assessments are anticipated to occur every 2-3 years • Estimated 5-year system life = 3 Assessments

  7. Assessment Costs • Contract rate per assessment - $1.7M (no video) • PWE Annual Total Operational Cost - $590k (includes video collection) • 3 Assessments over 5 years = $5.21M contract cost vs. $2.95M internal costs • Possible future partnerships with other area agencies may recoup some costs

  8. Technical Components of the Street Surface Assessment Vehicle GPS Unit 360 degree camera CrackScope Distance Measuring Instrument Road Profiler

  9. SSAV Capabilities • Assesses asphalt/concrete roads in clear weather • Measures distance traveled only (center-line miles) • Does not currently identify or “asset tag” any items • Program relies on machines and specific software to create a more consistent PCR score • For a road section, 100 is the starting value. Three reductions bring the PCR to its final number. • IRI or ‘roughness’ deduction • Rutting deduction • Cracking deduction

  10. What Happens Next? • Upcoming Completion Schedule • 11/30/2010 – 56% • 12/31/2010 – 62% • 03/30/2011 – 82% • 06/30/2011 – 100% • Video capture is being used for identification of key items • Actual completion time depends on the ability for the van to be on the road

  11. How Will We Use This Data? • To guide and expand maintenance programs • Overlay program • Concrete repairs • Primary factor for development and scheduling capital projects for streets

  12. Council Districts & SSAV Data

  13. 20 Worst Scored Thoroughfare Street Sections in the City

  14. Questions?

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