“surgical spending” for pavement preservation · from surface score history 0 ... lane miles...
TRANSCRIPT
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“Surgical Spending” forPavement Preservation
2007 School for Highway Superintendents
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Outline
• How we know which roads to fix.• Windows of opportunity for treatment.• Treat the pavement early.• Less expensive to keep good roads good.• Tools in the toolbox
How do we decidewhich roads to fix?
Pavement Management
The Right Pavementwith the Right Treatment
at the Right Time
Pavement Management
How do we identifycandidates for work?
Network Level Windshield Survey
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Pavement Surface Score
• 10 – 9: Excellent• 7 – 8: Good• 6: Fair• <5: Poor
89/10 – Excellent
98 - Good
107 - Good
116 - Fair
125 - Poor
134 - Poor
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E-Score Hardware
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Pavement Surface Score
10 – 9: Do Nothing8: Crack Seal7: PM Paving6: Rehab
<5: Major Rehab/Replace
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Pavement Surface Score
10 – 9: Do Nothing8: Crack Seal7: PM Paving6: Rehab
<5: Major Rehab/Replace
Pavement Management
Pavement Preservation Strategy
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Years
Typical Pavement Deterioration Curvefrom Surface Score History
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Flex/Overlay
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What are we trying to do with Preventive Maintenance?
• Seal cracks to keep water out
• Rejuvenate a weathered surface
• Prolong life of the pavement
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Side Benefits ofPreventive Maintenance
• Restores friction
• Some improvement to ride quality
• Some repair to rutting
Pavement Management
Pavement Preservation Strategy
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Time
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Pavement Performance Curveand Windows of OpportunityDo Nothing
Non-Paving PM
PM Paving
Multi-Course
Major Rehab/Recon
PM Overlay by Initial Surface Score
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Project Age
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core Score 6
Score 7
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$25k $25k $100k
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$1M
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$150k $1M
Poor Fair Good Excel
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Pavement Preservation
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Pavement Preservation
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Pavement Preservation
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Pavement Preservation
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Pavement Preservation
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Pavement Preservation
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Pavement Preservation
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October 3, 2000 17th Annual AGC Texas Trade &Equipment Show
Neil Insert Picture on this slide
Micro-Surfacing Operation
NovaChip
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Type I
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Type II
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Pavement Preservation Tools• Crack Sealing• Chip Seal• Quick-set Slurry• Microsurfacing• Paver-Placed
Surface Treatment• Single Course HMA• Mill and Fill• Cold-in-Place
Recycling
Far less expensive to keep good pavements good.
Treat the pavement early before distress becomes severe.
The time window is narrow for optimal performance.
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Poor Fair Good Excel
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Key Concept of Pavement Preservation
Questions?
