Implementation of a Profiler Certification Program in Florida Greene.pdfPROFILER SURFACE SECTION IRI...
Transcript of Implementation of a Profiler Certification Program in Florida Greene.pdfPROFILER SURFACE SECTION IRI...
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TRANSPORTATIONFlorida Department of
Implementation of a Profiler Certification Program in Florida
Road Profile User’s Group2017 Annual Meeting
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Florida Department of Transportation
Outline
• Profiler certification need• Certification track design & construction• Program status• Next steps
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Florida Department of Transportation
Pavement Smoothness Committee
• FDOT & industry members• Goals of committee
– Decoupling laser profiler & rolling straight edge
– Develop incentive specification based on IRI
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Florida Department of Transportation
IRI Incentive Specification
• Limited access roadways• Incentive: IRI 42 in/mile• Full pay: 43 in/mile IRI 55 in/mile• Disincentive: 56 in/mile IRI 95 in/mile• Remove & replace: IRI 95 in/mile• Consistency: 3% bonus if all LOTs 55 in/mile
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Florida Department of Transportation
LOT Pay Adjustment
($800)($700)($600)($500)($400)($300)($200)($100)
$0$100$200$300$400
30 40 50 60 70 80 90 100
LOT Pay Ad
justment, $
International Roughnes Index, in/mile
Incentive IRI ≤ 42 Full Pay 43≤ IRI ≤ 55
Disincentive56≤ IRI ≤ 95
Remove & ReplaceIRI ≥ 95
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Florida Department of Transportation
0
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2
3
4
5
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0 20 40 60 80 100 120
Per
cent
Feq
uenc
y
IRI (inch/mile)
Incentive IRI ≤ 42 Full Pay 43≤ IRI ≤ 55
Disincentive56≤ IRI ≤ 95
Remove & ReplaceIRI ≥ 95
Incentive Impact
Incentive Projects: IRI=39
2005 to 2010: IRI=49
2011 to 2016: IRI=45
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Florida Department of Transportation
Specification Implementation
• All limited access roadways• FDOT currently conducts
smoothness acceptance testing• Immediate need for contractor
process control• Goal: contractor acceptance testing
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Florida Department of Transportation
Profiler Certification Track
• Establish a standardized process to verify profilers are reliable and accurate
• Williston Municipal Airport, Levy County
• ~3,700 ft. long and 14 ft. wide
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Florida Department of Transportation
Track Sections
• Open and dense-graded sections• Three 0.1 mile long segments per surface type
– Smooth, IRI = 30 to 45 in/mile– Medium, IRI = 50 to 80 in/mile– Rough, IRI = 95 to 180 in/mile
• Smoothness ranges based on IRI specification & AASHTO R-56
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Florida Department of Transportation
How we targeted a specific roughness
1. Altered base elevation based on profile simulation2. Adjusted paver tow arm based on profile simulation3. Measured smoothness4. Repeat 2 & 3 for each AC lift
Elevation (in
ch)
Station (ft)Original Design Profile Final Design Profile
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Florida Department of Transportation
Lessons Learned
• There are many ways to create roughness• Treat as a research project• Coordination is critical
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Florida Department of Transportation
Stabilized Subgrade
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Florida Department of Transportation
Base & 1st Asphalt Lift
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Florida Department of Transportation
2nd Asphalt Lift & Friction Course
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Florida Department of Transportation
Initial Certification Values
PROFILER SURFACE SECTION IRI FILTER ACCURACY (%)
IRI FILTER REPEABILITY (%)
1
DenseSmooth 94.6 96.5
Medium 97.1 98.5
OpenSmooth 78.1 85.0
Medium 92.8 94.1
2
DenseSmooth 95.8 97.8
Medium 98.4 99.1
OpenSmooth 84.7 91.5
Medium 96.9 98.8
3
DenseSmooth 94.2 96.5
Medium 97.2 98.2
OpenSmooth 82.8 93.7
Medium 96.2 98.5
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Florida Department of Transportation
Before & After Line Laser Upgrade
SURFACE SECTION LASER TYPE IRI FILTER ACCURACY (%)
IRI FILTER REPEABILITY (%)
Dense
SmoothSpot 78.0 96.1
Line 94.6 96.5
MediumSpot 94.3 96.9
Line 97.1 98.5
Open
SmoothSpot 66.6 68.0
Line 78.1 85.0
MediumSpot 80.6 88.4
Line 92.8 94.1
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Florida Department of Transportation
Reference Profilers
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Florida Department of Transportation
Cross-Correlation Comparison
SECTION REFERENCE PROFILER IRI FILTER REPEABILITY (%)
MAX PERCENT IRI DIFFERENCE
Dense Smooth(IRI < 45 in/mile)
Roadbot 99.4 0.34
FDOT SurPro 4000 96.5 1.80
TTI SurPro 3000 97.0 0.62
Open Smooth(IRI < 35 in/mile)
Roadbot 96.6 1.41
FDOT SurPro 4000 88.4 3.83
TTI SurPro 3000 89.5 3.38
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Florida Department of Transportation
Next Steps
• Certification details– Criteria– Cost
• FDOT fleet certification• Expand incentive specification• Open house – first week of April 2018