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2012-2017 Proposed Highway Improvement Program. Public Works and Transportation Committee April 25, 2012. 2012-2017 Five Year Highway Improvement Program. Management philosophy sets system priorities : Preservation Modernization Expansion. Priority One: Preservation.
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2012-2017Proposed Highway Improvement Program Public Works and Transportation Committee April 25, 2012
2012-2017 Five Year Highway Improvement Program Management philosophy sets system priorities: • Preservation • Modernization • Expansion
Priority One: Preservation • Developing a set of projects • ARGUS Pavement Management Software • Keeping tabs on the system • Asset Inventories • $1.6 billion to build
Developing the Project Set • ARGUS Pavement Management System…… • ……Today is an introduction to ARGUS
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
Pavement ManagementSystem Components: • County highway database • Automated pavement testing • Repair strategies with costs • Pavement aging prediction • Optimization program
County Highway Database Contains information on… • Surface type • Surface width • Section area • Traffic volumes • Percentage of trucks
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
Automated Pavement Testing First:Laser Road Surface Tester (RST) measures… • Cracking • Rutting • Ride quality
Automated Pavement Testing Second:Dynaflect deflection tester measures strength and condition of … • Pavement • Subgrade
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
Repair Strategies and Costs • Four resurfacing strategies • Three “3R” strategies • Three reconstruction strategies • Associated per-square-yard costs
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
ARGUS Summary … Pavement Management System does not… • Replace professional judgment • Provide certain detailed project-specific information
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%
2012 – 2017Proposed Highway Improvement Program The following charts to appear in Section 2 Preservation Projects
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.
Keeping Tabs on the System:Asset Inventories • Pavement and bike facilities, guardrail • Bridges and railroad crossings • Signals and signs • Drainage and stormwater facilities • More…
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