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Pavement Preservation Philosophy utilizing Pavement Management Systems

Pavement Preservation Philosophy utilizing Pavement Management Systems. Riverside County has 7,300 square miles and is the 4 th largest County in California About the size of State of New Jersey Nationally 11 th largest County 1990 Population: 1.5 Million Est.

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Pavement Preservation Philosophy utilizing Pavement Management Systems

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  1. Pavement Preservation Philosophy utilizing Pavement Management Systems

  2. Riverside County has 7,300 square miles and is the 4th largest County in California • About the size of State of New Jersey • Nationally 11th largest County • 1990 Population: 1.5 Million Est. • 2010 Population: 2.2 Million Est. • 2018 Population: 2.5 Million Est. • 2030 Population: >3 Million Projected • 28 cities, 4 new since 2008

  3. Riverside County maintains the following infrastructures: • Over 2,200 miles of roadway • 108 bridges • 570 traffic signals • 10 Maintenance Yards (Countywide) • Approximately $200M in Annual Capital Budget

  4. TOTAL MILES (COUNTYWIDE)

  5. PAVEMENT MANAGEMENT • Program – StreetSaver by MTC • Uses PCI NEWLY PAVED FAILED ROAD

  6. DETERIORATION CURVE

  7. PAVEMENT INSPECTION • Inspection every year on ¼ of road network • Visual inspection by two-man crew • Data collection using tablet device • Automated evaluation • GIS integration

  8. DATA COLLECTION • GPR – layer thickness • FWD – structural condition • Coring – structural section

  9. PAVEMENT PRESERVATION • Definition - a program employing a network level, long-term strategy by using an integrated, cost-effective set of practices that extend pavement life (FHWA). • County’s Objective - Preserving roads already in good condition. • spending taxpayer’s money in a cost-effective manner • developing treatment methodologies based on pavement condition by using BMPs

  10. BEST MANAGEMENT PRACTICES • Achieving a target PCI • Seal Coat Treatment • Chip Seal • Slurry Seal • Cape Seal • Scrub Seal • Microsurfacing • Thin Overlays

  11. SEAL COAT • Chip/Seal • 120+ miles per year • RAP Chip • Slurry/Cape/Scrub Seal/Micro • 100+ miles per year • Type 2 RAP Chip

  12. OVERLAYS • Hot mix asphalt • 15% RAP • up to 2 inches thick • surface course – no RAP • Rubberized hot mix asphalt • crumb rubber from scrap tires • up to 2 inches thick

  13. RESURFACING/RECONSTRUCT • Mill & Fill • Full Reconstruction • Recycling • CIR (partial) • FDR (full depth)

  14. SEAL COAT PHOTOS

  15. CIR PHOTOS

  16. LESSONS LEARNED • Slurry Seal • Measurement & Payment – by TON • Full-time inspection • Testing – WTAT, portable truck scale, dipstick • Chip/Cape/Scrub Seal • Separate line item for emulsion and aggregate • Payment for emulsion by TON • Payment for aggregate by SQYD

  17. LESSONS LEARNED • CIR/FDR • Construction timing – Summer/Fall • Longer cure time in cool weather • Swell factor (10%) • Tend to ravel if left uncovered for more than 3 days • Apply fog seal to control raveling • Cost effective for long straightaway roads with minimum road curves and utility valves

  18. PMP EVALUATION • CSU Chico – CP2 (Professor Ding Cheng) • Objective of the Pavement Management Program (PMP) study • Evaluate the County PMP software • Evaluate the decision tree – treatment types and costs • Evaluate various budget scenarios and PCI goals to help dictate the allocation options for pavement preservation and rehabilitation • Provide recommendations and cost effectiveness measures for improving the County PMP

  19. DECISION TREE WITH LCC

  20. BUDGET SCENARIOS Three time periods (5, 10, and 20-year) were analyzed with various budget scenarios to determine the most effective approach to improve the average network PCI.

  21. DETERMINATION FACTORS • The various budget scenarios were evaluated based on 4 factors: • Network PCI • Deferred Maintenance Cost • Average Remaining Life • Total Overall Cost

  22. 5-YEAR SCENARIO

  23. 5-YEAR SCENARIO 2018 condition 2022 condition

  24. 10-YEAR SCENARIO

  25. 10-YEAR SCENARIO 2018 condition 2027 condition

  26. SUMMARY OF FINDINGS • SB 1 funding with 30% PM and 4% inflation has increased the PCI to 75 for the 5-year scenario. • SB 1 funding with 20% PM and 4% inflation has increased the PCI to 77 for the 10-year scenario.

  27. RECOMMENDATIONS • Continually update the costs and service life for each treatment in the decision tree. • A life cycle cost analysis should be used to select proper treatments for future decision tree update. • A balance of preservation and rehab or reconstruction should be utilized to improve the County’s pavement conditions. Keys to achieve the desired PCI include the following: • Optimize percentages for PM and Rehab (use lowest deferred maintenance cost) • Use innovative treatments that can improve life cycle cost

  28. QUESTIONS? Mojahed Salama – Deputy Director of Transportation E-mail: msalama@rivco.org Phone: (951) 955-6740 Elmer Datuin – Materials Engineer/Lab Manager E-mail: edatuin@rivco.org Phone: (951) 955-6762

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