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Pavement Asset Management

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Mark Osborn, NDOT Roadway Asset Management Engineer

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Pavement Asset Management

  1. 1. Pavement Asset Management January 23, 2019 Mark Osborn Roadway Asset Management Engineer
  2. 2. 2 Nebraska’s Asset Management Objectives 1. Maintain pavement and bridges in a state of good repair 2. Optimize budget expenditures 3. Meet or increase the expected life-span of the major assets 2
  3. 3. 3 LIFE CYCLE Design Construction *Inspection *Decision MakingMaintenance Rehabilitation Disposal 3
  4. 4. 4 Pavement Management at NDOT Collect Data Measure Performance Analyze System Prioritize Treatments SET PERFORMANCE TARGETS
  5. 5. 5 Pavement Management at NDOT Collect Data Measure Performance Analyze System Prioritize Treatments
  6. 6. 6 Pavement Inventory 6
  7. 7. 7 Pavement Condition Automated Data Collection (Rutting, Faulting, IRI, 3D Surface, Photos, & GPS data) Manual Visual Ratings (Cracking Distress) *Collect all 10,000 Miles each year
  8. 8. 8 3D Surface and Photos Pavement Condition – Distress Detection
  9. 9. 9 Summary of Data Collection • Inventory Data is collected from Construction and As-built plans • For each pavement section • Pavement structure, base, subgrade • Number of lanes, lane widths, shoulder widths, surfaced shoulder widths, etc. • Condition Data is collected in two ways • Profiler Vans • IRI, Rutting, Faulting, 1/10th mile • Manual Distress Ratings • Severity and extent of surface distresses every mile
  10. 10. 10 Pavement Management at NDOT Collect Data Measure Performance Analyze System Prioritize Treatments
  11. 11. 11 Performance Measures 2 Key Measures for Network Level Performance: IRI NSI
  12. 12. 12 Performance Measures - IRI •Why IRI? • This is how the general public evaluates our roads • Smoother roads are safer • Lowers vehicle operating cost • More enjoyable to drive on
  13. 13. 13 International Roughness Index IRI Rating Scale Asset Type Performance Measure Target Pavement % of NHS segments smoothness rated “good” based on IRI ≥65%
  14. 14. 14 Performance Measure 65% of NHS with IRI < 95 50.0% 60.0% 70.0% 80.0% 90.0% 100.0% 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent of "Smooth" Miles on the NHS (IRI<95) Interstate Goal for Nebraska NHS National NHS Nebraska NHS
  15. 15. 15 Performance Measures 2 Key Measures for Network Level Performance: IRI NSI
  16. 16. 16 Pavement Condition Rating – Nebraska Serviceability Index (NSI) Alligator Cracking Longitudinal Cracking Transverse Cracking Failures Rutting Asphalt NSI Concrete NSI Panel Cracking Panel/Joint Spalls Panel/Joint Repairs Pattern Cracking (ASR) Faulting 16
  17. 17. 17 NSI Rating Scale Nebraska Serviceability Index Very Good Good Fair Poor Very Poor 17
  18. 18. 18 Performance Measure 80-85% of Highways Rated Good Based on NSI 50.0% 60.0% 70.0% 80.0% 90.0% 100.0% 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Percent of Highway Miles Rated at Least "Good" (NSI ≥ 70) Interstate Total Highways Non-Interstate Goal for Total Highways
  19. 19. 19 Project Level NSI
  20. 20. 20 Performance Targets Collect Data Measure Performance Analyze System Prioritize Treatments SET PERFORMANCE TARGETS
  21. 21. 21 Historical Performance Measure Targets • State Wide Highway System - Average NSI of 84.7 • Based on historical pavement condition and funding levels • National Highway System - 65% rated good based on IRI 21 500 Miles/Year 10,000 Miles 20 Year Cycle
  22. 22. 22 TAMP - Transportation Asset Management Plan • The Transportation Asset Management Plan (TAMP) came about through requirements established by MAP-21 and FAST Legislation • Requirement for states to develop a risk-based asset management plan for the National Highway System (NHS) to improve or preserve asset condition and system performances • Final Rules were established May 20, 2017 22
  23. 23. 23 NHS - National Highway System • Essential roads for United States mobility, economy and defense • Goal is to optimize State use of Federal money, plan for risks 23
  24. 24. 24 New State Performance Targets Asset Type Performance Measure Target Pavement Weighted average NSI for the interstate system ≥86 Weighted average NSI for the non- interstate NHS system ≥80 24
  25. 25. 25 MAP-21 Pavement Condition Ratings 25 • All 3 “Good” = Good • If 2 or more “Poor” = Poor • Anything Else = Fair
  26. 26. 26 New National Pavement Performance Targets Asset Type Performance Measure Target Pavement % of pavements on the interstate system in good condition ≥ 50 % of pavements on the interstate system in poor condition ≤ 5 % of pavements on the non- interstate National Highway System in good condition ≥ 40 % of pavements on the non- interstate National Highway System in poor condition ≤ 10 26
  27. 27. 27 Setting Targets 87% 86% 86% 87% 85% 87% 90% 92% 89% 58% 59% 62% 62% 61% 58% 62% 60% 59% 64% 65% 68% 68% 66% 64% 68% 67% 65% y = 0.0065x + 0.8443 R² = 0.5596 y = 0.001x + 0.5966 R² = 0.0214 30% 40% 50% 60% 70% 80% 90% 100% 2009 2010 2011 2012 2013 2014 2015 2016 2017 IRI - % Good (<95 in/mi) NHS - Interstate NHS - Non-Interstate & Off-System NHS - Overall Linear (NHS - Interstate) Linear (NHS - Non-Interstate & Off-System) Linear (NHS - Overall ) 61.0% 2019 2021 60.8% 92.9% 91.6%
  28. 28. 28 Summary of Performance Measures and Setting Targets • Historical target of 84.7 average NSI will still be used in our pavement management system • State Performance Measure Targets will be presented in our Annual Report to the public • 80-85% of State Highways will be rated Good based on NSI > 70 • 65% of NHS routes will be rated Good based on IRI < 95 in/mi • National Performance Measure Targets for MAP-21 requirements • ≥ 50% of the Interstate pavement in Good condition • ≤ 5% of the Interstate pavement in Poor condition • ≥ 40% of the Non-Interstate pavement on the NHS in Good condition • ≤ 10% of the Non-Interstate pavement on the NHS in Poor condition
  29. 29. 29 Pavement Management at NDOT Collect Data Measure Performance Analyze System Prioritize Treatments
  30. 30. 30 Pavement Optimization Program POP Pavement Optimization Program
  31. 31. 31 Pavement Data
  32. 32. 32
  33. 33. 33
  34. 34. 34 Life-Cycle Cost Analysis
  35. 35. 35 Types of Analysis 1. Users can compute the cost to maintain a selected NSI value over a selected number of years. Answers the question “How much will it cost to maintain my system?” 2. Users can compute the resulting NSI value over a selected number of years, given a specific budget. Answers the question “What will the condition of my system be if I spend X number of dollars?” 35
  36. 36. 36 Pavement Analysis Factors • Current condition ratings for age, NSI, PSI, cracking, rutting, and faulting • Deterioration rates for NSI, PSI, cracking, rutting, and faulting • Length, strategy types, and cost per mile for each strategy • One year program 36
  37. 37. 37 Asphalt/Composite Decision Tree 37
  38. 38. 38 PCC Decision Tree 38
  39. 39. 39 Strategies 39
  40. 40. 40 Outputs 40 84.7
  41. 41. 41 Outputs 41
  42. 42. 42 Summary of Data Analysis • Use the Pavement Optimization Program (POP) Life-Cycle Cost Analysis with current condition and inventory • Excludes pavement sections in the one year program • Deteriorates factors every year until an action can be taken • Strategy is selected by the decision trees • Cost is assigned until the funds are exhausted
  43. 43. 43 Pavement Management at NDOT Collect Data Measure Performance Analyze System Prioritize Treatments
  44. 44. 44 Priority Ranking 44
  45. 45. 45 Candidate Lists
  46. 46. 46 CFR 515.7–Risk (Definition) 46
  47. 47. 47 Identifying Risks – Common Risk Areas Environmental Conditions High-Risk, High-Value Assets Financial Legal or Compliance Demand Information or Decision Operational Hostile Acts, Malfeasance, Accidents 47
  48. 48. 48 Risk Matrix 48
  49. 49. 49 Potential Risks to Nebraska’s NHS Some of the risk’s NDOT identified • Funding – increase or decrease • Deterioration of our maintenance equipment • Lack of qualified personnel • Reduction of staff • Capacity & reliability of computer network • Regulations that increase loading on pavements • Extreme weather
  50. 50. 50 Selection of Projects for the Program Factors considered in the selection of a project from the candidate list • Risk • Funding • Performance of the system • Environmental • Deliverability • Constructability • Staffing • Stakeholder input
  51. 51. 51 Thank You!! Questions?

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