Pavement Performance Measurement For High-Speed, High … · 2013. 8. 26. ·...
Transcript of Pavement Performance Measurement For High-Speed, High … · 2013. 8. 26. ·...
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Tony Rome, P.E. | Mike Ross, P.E. City of Overland Park, Kansas
August 26, 2013
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“Keep good roads good”
Separate the engineering from the politics
COE “PAVER” system (since 1984). ◦ Provides PCI – structural condition
◦ Provides condition and treatment history
◦ Models impact of treatments on network
Maintain within budget
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Thoroughfares ◦ Built to high standards
◦ 45 MPH +
◦ ADT > 10,000
Safety Concerns
Impact on Traffic
Leads to the
question…
How to safely rate
thoroughfares? [
[
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• COE PAVER
• Windshield
• Calendar
• Super Van
• Roughness
1970s ◦ World Bank sponsored studies to
determine plans for developing
countries infrastructure
1982 ◦ Brazil correlation experiment
established IRI as consistent method
1986 ◦ Methods to calculate IRI presented
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Roughometer III (ARRB) ◦Used from 2011-Present
◦ Integrated GPS device
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August 19, 2013, 10:30 AM
K:\Operations\Paver\Roughometer\2013 Data\Survey Data\2013-07-19\2013-07-19 14h23m07s Survey.rgd
Distance (mi)2.001.000.00
IRI (i
n/m
i)
680
660
640
620
600
580
560
540
520
500
480
460
440
420
400
380
360
340
320
300
280
260
240
220
200
180
160
140
120
100
80
60
40
20
0
Excellent
Good
Fair
Poor
Bad
Ross/Rome Field Testing ◦Vehicle speed
◦Driver influence
◦Survey Techniques
◦Thresholds
Speed o Minimum > 20 mph
o 25-35 mph most consistent
Driver Impact o < 5% at recommended speeds
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Survey Techniques ◦Lead-in
◦Constant speed (Minimize
braking/acceleration)
◦Avoid valve/manhole lids
◦Drive 500 ft in advance
Observed Range ◦65 (Month old overlay on
Metcalf – 87th to 99th Street)
◦184 (Maintenance required on
Quivira – College to 119th Street)
Data Processing ◦Remove low-speed records
(< 20 mph)
◦ “Clean” data using statistics routine
◦ Import Average IRI into PAVER
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City’s ranking system PCI based ◦ “Keep good streets good”
Structural vs. Ride Quality
Divorce thoroughfares from PCI ◦ “Roughest first”
FHWA (Urban/Rural Interstate 2006)
◦ IRI < 170: Acceptable
◦ IRI < 95: Good/Very Good
Pennsylvania (Non-NHS, ADT > 2000)
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Pavement Serviceability Rating ◦ "The judgment of an observer as to
the current ability of a pavement to
serve the traffic it is meant to serve"
(Highway Research Board, 1962)
PSR vs. IRI ◦Patterson study (1986)
links PSR and IRI
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Over 600 Lane Miles
(Includes Other City)
◦Network Average = 138
◦Range: 65 - 428
Rating Range Percent
Very Good IRI < 82 5%
Good 82 < IRI < 184 83%
Fair/Poor IRI > 184 12%
Maintenance Planning Aids – Point map
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Maintenance Planning Aids – Section Map
Data Collection ◦ Inspect annually at minimum
◦Establish performance curves
◦Adopt GASB 34 standards for
thoroughfares based on
IRI/PSR
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Data Analysis ◦Results shared with maintenance
division for spot repair
◦Results used as tool in annual
maintenance planning
◦ Investigating purchase of full-size
profiler/distress vehicle (SuperVan)
Affordable
Accurate and Repeatable
Objective Measurement
Established World Standard
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