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PAVEMENT CONDITION SURVEY
performed by FDOT
- EVALUATE 100% OF THE STATE
MAINTAINED ROADWAY SYSTEM AS TO
THE CONDITION AND RIDE QUALITY OF
THE WEARING SURFACE
- PROVIDE HIGHWAY PERFORMANCE
MONITORING SYSTEM (HPMS) RIDE DATA
Determine present condition
Compare present with past condition
Predict deterioration rates and funding needsneeds
Justify statewide annual budget request for rehabilitation
Basis for districts’ project rehabilitation funding
FLEXIBLE PAVEMENT RATING
- RIDE (0 – 10)
- RUTTING (0 – 10)
- PROFILER RUT DEPTH
- IF NO RIDE/MANUAL RUT DEPTH
- CRACKING (0 –10)
- INCLUDES PATCHING AND RAVELING
RIDE DATA IS COLLECTED
WITH AUTOMATED
EQUIPMENT
- • HIGH SPEED PROFILERHIGH SPEED PROFILER Class 1 by ASTM E-
LASER PROFILERLASER PROFILER
LASER SENSORLASER SENSOR OPERATOR CONSOLEOPERATOR CONSOLE
Using a Road Profiler
The pavement profile is used to compute the Ride Number
using a mathematical transformation equation. The Ride
Number gives a pavement rating similar to PSI, but with a
scale of 0 to 10.
A computer software is used to simulate a wheel going
over a pavement profile at 80 km/hr and to compute
the International Roughness Index (IRI), which is the
cumulative vertical movement of the wheel divided by
the distance traveled. It is reported in units of m/km.
Correlation between IRI and PSI (From: Gillespie, T.D., "Everything You Always Wanted to Know about the IRI, But Were Afraid to Ask," presented at the Road ProfileUsers Group Meeting, September 22-24, 1992, Lincoln, Nebraska )
• Ride Number (RN) - ASTM E-
Used For Pavement Management System
and For Ride Acceptance Testing On New
C i
RIDE VALUES
Construction
• International Roughness Index (IRI) -
ASTM E-
Used For Highway Performance
Monitoring System
- Distance measurement (DMI) on calibrated
section
MONTHLY
- A minimum of 3 sections (currently 4)
- Reference sections contain various levels of smoothness
Monthly (Section Verification)
- Smoothness of Reference Sections determined with
Class 1 profiler (Dipstick)
Annually
- Rater verification is performed each year on various
sections throughout the area.
Annually
RUTTING DEFECT RATING I-
Measurement of Rut Depth
Using a Road Profiler PROFILER RUTTING DEDUCT POINTS
Rut Depth (inches)
Range (inches)
Deduct Points 0 0.00 - 0.06 0 1/8 0.07 - 0.19 1 1/4/ 0.20 - 0.31 2 3/8 0.32 - 0.44 3 1/2 0.45 - 0.56 4 5/8 0.57 - 0.69 5 3/4 0.70 - 0.81 6 7/8 0.82 - 0.94 7 1 0.95 - 1.06 8 1 1/8 1.07 - 1.19 9 1 1/4 + 1.20 + 10
MANUAL RUT DEPTH MEASUREMENT
MANUAL RUTTING DEDUCT POINTS
Rut Depth
(inches)
Deduct
Points
HAIRLINE CRACKS 1/8 INCH (3.18 mm).
CLASS 1B CRACKINGCLASS 1B CRACKING
CRACKING DEFECT RATING CLASS 1B CRACKING
MAY HAVE SLIGHT SPALLING AND SLIGHT TO MODERATE BRANCHING.
WHEEL PATH AREAS
FLORIDAFLORIDA
I-
CWCW
C0C
PREDOMINATE CRACKING CLASS
IB CRACKING II CRACKING III CRACKING
% of PVT
Area affected
by Cracking
CODE DEDUCT CODE DEDUCT CODE DEDUCT
CONFINED TO THE WHEEL PATHS
(CW)
00-05 A 0.0 E 0.5 I 1.
06-25 B 1.0 F 2.0 J 2.
26-50 C 2.0 G 3.0 K 4.
51 + D 3.5 H 5.0 L 7.
OUTSIDE THE WHEEL PATHS
(CO)
PREDOMINATE CRACKING CLASS
IB CRACKING II CRACKING III CRACKING
% of PVT
Area affected
by Cracking
CODE DEDUCT CODE DEDUCT CODE DEDUCT
00-05 A 0.0 E 0.0 I 0.
06-25 B 0.5 F 1.0 J 1.
26-50 C 1.0 G 1.5 K 2.
51 + D 1.5 H 2.0 L 3.
NOTES FOR CW & CO WHEEL
PATHS
- PERCENTAGES FOR CW AND CO ARE ESTIMATED SEPARATELY. EACH REPRESENTING 100% OF ITS RESPECTIVE AREAAREA.
- CRACKING PERCENTAGES ARE COMBINED BUT ONLY THE PREDOMINATE TYPE OF CRACKING PRESENT WILL BE CODED
- CRACKING DEFECT RATING = 10 - (CW + CO).
RIGID PAVEMENT RATING
- RIDE RATING
- DEFECT RATING
RIGID PAVEMENT DEFECTS
Surface Deterioration
Spalling
Corner Cracking
Shattered Slab
Patching
Transverse Cracking
Longitudinal Cracking
Faulting
Pumping
Joint Condition
SURFACE DETERIORATION SPALLING
PATCHING TRANSVERSE CRACKING
LONGITUDINAL CRACKING CORNER CRACKING
DEDUCT VALUES FOR RIGID PAVEMENT
TYPE OF DISTRESS SEVERITY NUMERIC VALUE Faulting 1.0 per 1/32” Faulting Pumping Light Light Light Light
Moderate
1%-25% 26%-50% 51%-75% 76%-100%
1%-25%
2 3 4 5
4 Moderate Moderate Moderate
Severe Severe Severe Severe
26%-50% 51%-75% 76%-100%
1%-25% 26%-50% 51%-75% 76%-100%
6 8 10
6 9 12 15 Joint Condition Partially Sealed Not Sealed
5 10
TRAINING
- RATERS ARE COMPARED ANNUALLY ON PAVEMENTS THAT EXHIBIT A RANGE OF CONDITIONS
RATED
MILES
LANE
MILES MILESMILES
FLEXIBLE 18,329 41,
RIGID 364 988
TOTAL 18,693 42,
YearYear 20032003 20042004 20052005 20062006 20072007
RideRide
Statewide Deficient Miles
RideRide 10631063 MilesMiles
MilesMiles
MilesMiles
MilesMiles
MilesMiles
CrackCrack
MilesMiles
MilesMiles
MilesMiles
MilesMiles
MilesMiles
RutRut
596 Miles596 Miles
498 Miles498 Miles
474 Miles474 Miles
384 Miles384 Miles
367 Miles367 Miles
CRACK
Crack Changes
2006 Compared to 2007
92.0% of the 2007 Crack Ratings are within +/- 1 Point Compared to 2006
Rut Changes
2006 Compared to 2007
99.8% of the 2007 Rut Ratings are within +/- 1 RUT Point Compared to 2006
Ride Changes
2006 Compared to 2007
RIDE
99.9% of the 2007 Ride Ratings are within +/- 1 Point Compared to 2006
2007 Crack Distribution
38,546 lane miles 15.53% rated 6 or below
Flexible Pavements Statewide
2007 Rut Distribution
38,546 lane miles 0.95% rated 6 or below
Flexible Pavements Statewide
2007 Ride Distribution
Flexible Pavements Statewide
38,491 lane miles 9.04% rated 6 or below
AUTOMATED DISTRESS EQUIPMENT
(Under experimentation)
Accelerometer – corrects for the vertical movement of the vehicle
- Extremely sensitive sensors
- Measure acceleration with virtually infinite resolution
- “All weather” instruments
- 0.5 G to 10 G – range sensing pivot
- Mounted into front bumper
Computer systems
- Types:
- 3 Pentium IV computer systems for collection of data from digital cameras with Windows 2000
- Hybrid DOS/Windows98 MDR computer
- Line Scan Camera Computer:
- Controls all processes related to the pavement camera
- Contains an encoder board that controls the timing of the pavement camera
- Area Scan Cameras (Right of Way and Sign Cameras):
- Collect images by taking digital snapshots at specified intervals
- Contains APIX capture card
Thank You!
Questions?
