2012-2017 Proposed Highway Improvement Program - PowerPoint PPT Presentation

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2012-2017 Proposed Highway Improvement Program

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  1. 2012-2017Proposed Highway Improvement Program Public Works and Transportation Committee April 25, 2012

  2. 2012-2017 Five Year Highway Improvement Program Management philosophy sets system priorities: • Preservation • Modernization • Expansion

  3. Priority One: Preservation • Developing a set of projects • ARGUS Pavement Management Software • Keeping tabs on the system • Asset Inventories • $1.6 billion to build

  4. Developing the Project Set • ARGUS Pavement Management System…… • ……Today is an introduction to ARGUS

  5. Pavement Management Goal Make cost effective decisions For given 5 year budget levels: • Where repairs are needed • What repair strategies to use • When the repairs should be done

  6. Pavement ManagementSystem Components: • County highway database • Automated pavement testing • Repair strategies with costs • Pavement aging prediction • Optimization program

  7. County Highway Database Contains information on… • Surface type • Surface width • Section area • Traffic volumes • Percentage of trucks

  8. Automated Pavement Testing • About 855 lane miles in system • County is divided into quadrants • One quadrant is tested each year • Entire county is covered in four years

  9. Automated Pavement Testing First:Laser Road Surface Tester (RST) measures… • Cracking • Rutting • Ride quality

  10. Automated Pavement Testing Second:Dynaflect deflection tester measures strength and condition of … • Pavement • Subgrade

  11. Repair Strategies and Costs Two Groups of Roadway Priorities: (starting with 2010-2014 program analysis) • Four lane roads - 53 miles • Two lane roads - 244 miles

  12. Repair Strategies and Costs • Four resurfacing strategies • Three “3R” strategies • Three reconstruction strategies • Associated per-square-yard costs

  13. Pavement Aging Prediction Costs

  14. ARGUS Summary Pavement Management System does… • Assess the present condition of the system • Estimate future road conditions • Identify and rank road projects • Maximize the condition of the system within the given budget

  15. ARGUS Summary … Pavement Management System does not… • Replace professional judgment • Provide certain detailed project-specific information

  16. LCDOT ARGUS results • Started in 1986 • System condition has improved from a rating of 68to 79(on 100 scale) • Area of backlog and failing pavement has been reduced from 55% to 9%

  17. 2012 – 2017Proposed Highway Improvement Program The following charts to appear in Section 2 Preservation Projects

  18. 2012 Traffic Volumes

  19. Definitions of Pavement Condition Good (80 – 100)Sections may require crack sealing or a thin overlay. These sections do not require immediate attention. Pavement in this category is generally less than 12 years old. Satisfactory (70-79)Sections may require resurfacing or other rehabilitation in the near future. Pavement is generally 12-14 years old. Failing (60-69)Will require some type of improvement in the near future to preserve the usability of the surface and avoid the need for reconstruction. This is pavement that is approaching the end of its useable life. Backlog (10-59)May require surface and base course reconstruction to restore roadway serviceability. Some may require total reconstruction, including reconstruction of the subgrade. Pavement in this category is generally more than 15 years old.

  20. Current Pavement Condition = 79

  21. 2012 Pavement Conditions

  22. ARGUS optimizes improvements

  23. Multiple treatments evaluated

  24. System Recommendations2013 - 2017

  25. System Preservation Projects 2013-2017

  26. 2013 Projects

  27. 2014 Projects

  28. 2015 Projects

  29. 2016 Projects

  30. 2017 Projects

  31. Keeping Tabs on the System:Asset Inventories • Pavement and bike facilities, guardrail • Bridges and railroad crossings • Signals and signs • Drainage and stormwater facilities • More…

  32. Program resurfaces about12 miles per year

  33. Many roads initially built in the 1950s

  34. Inventory: Lane Miles

  35. Inventory: Culverts

  36. Age of Highway Bridges

  37. Age of Bridge Deck Surface

  38. Age of Bike and Pedestrian Bridges

  39. Bridges: Sufficiency Ratings

  40. Stormwater Management Facilities

  41. By the NumbersInventory: Non-Pavement Assets

  42. Inventory: Signs

  43. Inventory: Railroad Crossings

  44. Inventory: Signal Controllers

  45. Priority One: Preservation • Developing a set of projects • ARGUS Pavement Management Software • Keeping tabs on the system • Asset Inventories • Next Program Presentation: • Priority Two – System Modernization • Priority Three – System Expansion