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Chapter 3 Framework for Treatment Selection

Chapter 3 Framework for Treatment Selection. From… Maintenance Technical Advisory Guide (MTAG). Introduction to Pavement Treatment Selection. What is Treatment Selection ? Why use Treatment Selection?. What is Treatment Selection.

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Chapter 3 Framework for Treatment Selection

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  1. Chapter 3Framework for Treatment Selection From… Maintenance Technical Advisory Guide (MTAG)

  2. Introduction to Pavement Treatment Selection • What is Treatment Selection ? • Why use Treatment Selection?

  3. What is Treatment Selection A guide to assist maintenance personnel in making better and more informed decisions in selecting and applying maintenance treatments

  4. Why Use A Treatment Selection Process • Covers all the major treatment types currently used by Caltrans for flexible pavements and allows for inclusion of future strategies • Treatment Selection is a complex, yet important procedure to ensure a optimum pavement treatment

  5. Factors Affecting Treatment Selection • Pavement age, condition • Traffic levels, expected future plans • Available funding • Agency policy

  6. Treatment Selection based on Pavement Condition

  7. Treatment Selection based on Minimum Cost, Optimum Timing

  8. Issues Treatment Selection Addresses • Will the treatment address the distresses present? (i.e., Will it work?) • Can the required preparation for the treatment be carried out? • Is the treatment cost effective? • Will the treatment be performed before the situation being addressed changes?

  9. Treatment SelectionTraining Modules Available • MTAG Treatment Selection • Life Cycle Cost Analysis (to be developed later)

  10. End Overview

  11. Module 3-1 Treatment Selection From… Maintenance Technical Advisory Guide (MTAG)

  12. General Strategy Selection Process • Factors to consider • Pavement performance curves • Selection of appropriate treatments • Timing of the treatment

  13. Seals (Fog, Slurry, Chip) Crack Seal/Fill Micro-Surfacing Thin HMA Overlays Bonded Wearing Course Surface Recycling Crack & Joint Re-Seal Partial & Full Depth Repair Dowel Bar Retrofit Diamond Grinding & Grooving Under-Sealing Typical Caltrans Treatments AC PCC www.dot.ca.gov/hq/maint/MTA_guide.htm

  14. Treatment Selection Based on Pavement Condition

  15. Caltrans Approach to Selecting Maintenance Treatments • Assess Existing Pavement Conditions • Determine the Feasible Treatment Options • Analyze and Compare the Feasible Options

  16. Caltrans Approach to Selecting Maintenance Treatments • Assess Existing Pavement Conditions • Conduct visual site inspection and/or review project information • Perform testing on the existing pavement, as conditions require • Define the performance requirements for the treatment

  17. Caltrans Approach to Selecting Maintenance Treatments Caltrans Pavement Condition Survey Table

  18. 2006 Maintenance Directive • Basis for Caltrans Maintenance Program • Annual contract maintenance program • Evaluate applicability of various treatments • Comparison based upon pavement condition environmental factors • Evaluates applicability based upon type of distress condition as well as extent of cracking

  19. Maintenance Selection – Detailed Example

  20. Maintenance Selection on Cracks - Overview

  21. Guidelines for Effective Treatments on Cracks – Detailed Example

  22. Caltrans Approach to Selecting Maintenance Treatments • Analyze and Compare the Feasible Options • Several treatments may be feasible • Cost and life of the treatments vary • Effect of the treatment on the life extension of the existing pavement • Other factors to consider: cost effectiveness, treatment timing, traffic level, and constructability

  23. Estimated Life of Treatments

  24. Approach for Selecting Maintenance Treatments • Cost Effectiveness • Equivalent Annual Cost • Life Cycle Cost Analysis • Selection of Maintenance Treatments • Performance and constructability • Customer satisfaction • Ranking of selected treatments by rating overall importance

  25. Rating Evaluation Worksheet

  26. Rating Evaluation Example

  27. LCCA Lives of Treatments Cost of Treatments User Costs • Cost Effectiveness of Treatments • Cost of Pavement Preservation vs. Rehabilitation Revised Strategy Selection Process Proposed LCCA Analysis

  28. LCCA Elements for Pavements • Type and life of maintenance and rehabilitation treatments • Agency costs • User costs (auto repairs, safety, delays) • Salvage value • Time value of money (present net value vs. annual cost)

  29. Proposed Additions to the Strategy Selection Process • Selected updates to the Matrix for Flexible Pavements (estimated treatment lives and costs) • Effect of pavement condition, traffic and Climate on treatment lives

  30. Discussion of Process • Guidelines for Selection of Pavement Preservation Treatments • Inclusion of LCCA and Strategies for Concrete Pavements Preservation • Peer Reviewed (PPTG, FHWA, Caltrans PST)

  31. Conclusions • Caltrans developed the MTAG, a dynamic, flexible document that is updated as needed • The strategy selection process is now a standard practice for use by maintenance personnel MTAG – www.dot.ca.gov/hq/maint/MTA_guide.htm

  32. Questions?

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