Highway Performance Monitoring System

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PAVEMENT DATA ITEMS
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Climate_Shapes (4 LTPP zones)
Soil_Shapes
HPMS Pavement Data
Summary level data
Metadata
Section level data
Estimates
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Pavement Summary Data
Included in Statewide Summaries Table
STATEWIDE SUMMARIES TABLE STATEWIDE SUMMARIES TABLE STATEWIDE SUMMARIES TABLE STATEWIDE SUMMARIES TABLE
Field Name Data Type Description Valid Values
Paved RMC Length Decimal(8,3) Paved Rural Minor Collectors Report total miles of paved roads to the nearest mile.
Paved RL Length Decimal(8,3) Paved Rural Locals Report total miles of paved roads to the nearest mile.
Paved UL Length Decimal(8,3) Paved Urban Locals Report total miles of paved roads to the nearest mile.
Unpaved RMC Length Decimal(8,3) Unpaved Rural Minor Collectors Report total miles of unpaved roads to the nearest mile.
Unpaved RL Length Decimal(8,3) Unpaved Rural Locals Report total miles of unpaved roads to the nearest mile.
Unpaved UL Length Decimal(8,3) Unpaved Urban Locals Report total miles of unpaved roads to the nearest mile.
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Item 47 IRI (International Roughness
Index)

• Definition A statistic used to estimate the
  amount of roughness in a measured longitudinal
  profile
• Extent Requirement All paved NHS and principal
  arterials, rural minor arterial Sample Panel
  sections

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Item 47 IRI (contd)

• Guidance
• Code a default date when IRI date is unavailable
• Measure annually for NHS sections
• Every 2 years for other sections
• Include structures and railroad crossings in
  measurement

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Item 47 IRI (contd)

• Guidance (contd)
• Measure /report consistently for same direction
  and lane
• Report the average of right and left quarter-car
  IRI Mean Roughness Index (MRI)
• Report either IRI or PSR for samples on rural
  major collectors, urban minor arterials and
  collectors

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Item 48 PSR (Present Serviceability
Rating)

• Definition Present Serviceability Rating (PSR)
  for pavement condition
• Extent Requirement All paved urban minor
  arterial, urban collector, and rural major
  collector Sample Panel sections

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Item 48 PSR (contd)

• Guidance
• Not required if IRI is reported
• Code PSR based on IRI data collection practices
• If rating is unavailable, refer to Table 4.4

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Item 49 Surface Type

• Definition Surface type on a given section
• Extent Requirement All Sample Panel sections

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Item 49 Surface Type (contd)

Table 4.5
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Item 50 Rutting

• Definition Average depth of rutting
• Extent Requirement All paved Sample Panel
  sections

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Item 50 Rutting (contd)

• Guidance
• Collect on a two-year cycle
• Report for all AC and composite surface types
  (where AC is the top layer)
• Report average rutting value of both wheel paths
• Report for IRI inventory direction and lane

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Item 50 Rutting (contd)
Rutting Example
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Item 51 Faulting

• Definition The average vertical displacement
  (difference in elevation) between adjacent
  jointed concrete panels in the direction of
  travel
• Extent Requirement All paved Sample Panel
  sections

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Item 51 Faulting (contd)

• Guidance
• Collect on a two-year cycle
• Measure every joint and report as average
• Report for all JPCP surface types

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Item 51 Faulting (contd)
Faulting Example
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Item 51 Faulting (contd)
Faulting Example (Plan View)
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Item 52 Cracking Percent

• Definition Estimate of percent area with fatigue
  type cracking for AC pavements (typically in
  wheel path) and percent of slabs with cracking
  for PCC pavements
• Extent Requirement All AC, PCC, and composite
  paved Sample Panel sections

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Item 52 Cracking Percent (contd)

• Guidance
• Report for IRI inventory direction and lane
• Collect on a two-year cycle
• Report as percent of actual pavement with fatigue
  cracking
• Determine best estimate of area with fatigue
  cracking

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Item 52 Cracking Percent (contd)
AC High Severity Longitudinal Cracking
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Item 52 Cracking Percent (contd)
AC Moderate Severity Fatigue Cracking
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Item 52 Cracking Percent (contd)
JCP High Severity Longitudinal Cracking
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Item 53 Cracking Length

• Definition Estimate of relative length in feet
  per mile (ft/mi) of transverse cracking for AC
  pavements and reflection cracking for composite
  pavements where AC is the top surface layer
• Extent Requirement All AC (transverse cracking),
  and composite (reflection cracking) paved Sample
  Panel sections

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Item 53 Cracking Length (contd)

• Guidance
• Collect on a two-year cycle
• Report for AC and reflection cracking for
  composite pavements
• Report for IRI inventory direction and lane
• Cracks must be at least 6 ft. in length
• Report the summation of lengths of all transverse
  cracks

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Item 53 Cracking Length (contd)
High Severity AC/Composite Reflection Cracking
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Item 53 Cracking Length (contd)
High Severity AC Transverse Cracking
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Item 54 Year of Last Improvement

• Definition The year in which the roadway surface
  was last improved
• Extent Requirement All paved Sample Panel
  sections

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Item 54 Year of Last Improvement
(contd)

• Guidance
• Report for IRI inventory direction and lane
• Report for gt 0.5 inches of compacted pavement
  material
• Report for either the date construction ended, or
  opened to traffic
• Retain coded improvement year, until next surface
  improvement

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Item 55 Year of Last Construction

• Definition The year in which the roadway was
  constructed or reconstructed
• Extent Requirement All paved Sample Panel
  sections

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Item 55 Year of Last Construction
(contd)

• Guidance
• Report for IRI inventory direction and lane

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Item 56 Last Overlay Thickness

• Definition Thickness of the most recent pavement
  overlay
• Extent Requirement All paved Sample Panel
  sections

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Item 56 Last Overlay Thickness (contd)

• Guidance
• Report for IRI inventory direction and lane
• Report all overlays gt 0.5 in. in thickness

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Item 57 Thickness Rigid

• Definition Thickness of the rigid pavement
• Extent Requirement All paved Sample Panel
  sections

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Item 57 Thickness Rigid (contd)

• Guidance
• Report for IRI inventory direction and lane
• Must reflect the last improvement on the section
• Surface Type codes 3, 4, 5, 7, 8, 9,
  and 10 indicate rigid pavements
• For composite pavements, code this item and Data
  Item 58

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Item 58 Thickness Flexible

• Definition Thickness of the flexible pavement
• Extent Requirement All paved Sample Panel
  sections

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Item 58 Thickness Flexible (contd)

• Guidance
• Report for IRI inventory direction and lane
• Report the total thickness of AC pavement
• Report AC portion thickness of composite
  pavements
• Surface Type codes 2 ,6, 7 and 8
  indicate flexible pavements
• For composite pavements, code this item and Data
  Item 57

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Item 59 Base Type

• Definition The base pavement type
• Extent Requirement All paved Sample Panel
  sections

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Item 59 Base Type (contd)

• Guidance
• For multiple base types, code for the layer
  immediately below surface
• Report for IRI inventory direction and lane

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Item 60 Base Thickness

• Definition The thickness of the base pavement
• Extent Requirement All paved Sample Panel
  sections

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Item 60 Base Thickness (contd)

• Guidance
• For multiple base types, report the total
  thickness of all base layers
• Report for IRI inventory direction and lane

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Item 61 Climate Zone

• Definition Climate zone as defined by the 4 LTPP
  climate zone descriptions
• Extent Requirement All Sample Panel sections
• FHWA coded

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Item 61 Climate Zone (contd)
LTPP Climate Zone Map
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Item 62 Soil Type

• Definition Soil type as defined by AASHTO soil
  classes
• Extent Requirement All paved Sample Panel
  sections
• FHWA coded

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Pavement Estimates Data

• Binder_Type
• Dowel_Bar
• Joint_Spacing

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Pavement Metadata

• Used to describe, interpret submitted data
• State/off-State system bifurcation
• Rural/urban bifurcation
• Functional system breakout

Code Description Code Description
1 IRI_EQUIP_TYPE 8 FAULTING_METHOD
2 IRI_INTERVAL 9 FAULTING_EQUIP_TYPE
3 RUTTING_METHOD 10 CRACKING_FAT_EQUIP
4 RUTTING_EQUIP_TYPE 11 CRACKING_FAT_CRACK_TYPE
5 RUTTING_NUM_SENSORS 12 CRACKING_TRAN_EQUIP
6 RUTTING_INTERVAL 13 CRACKING_TRAN_CRACK_TYPE
7 FAULTING_INTERVAL 14 CRACKING_METHOD
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HPMS Pavement Issues

• Data item section lengths impact performance
  measures

IRIlt95 50.0

IRI (in/mi) 87 92 100 122 75 178 111 90 91 115
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

IRIlt95 30.0

IRI (in/mi)   93   99 99 178 102 102 102 102
0.0 0.3 0.5 0.6 1.0
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HPMS Pavement Issues

• Average HPMS IRI Reporting Lengths