LTPP ProgramLTPP Program
Presented to theACPA Professors Workshop
Skokie, IL June 19, 2008
Long-Term Pavement Performance ProgramLong-Term Pavement Performance Program
LTPP ProgramLTPP Program
• Fact about the LTPP Program• LTPP/ASCE Data Analysis Contest• Key Features of DataPave Online• Sample Data Extraction• Other LTPP Products
Scope of PresentationScope of Presentation
LTPP ProgramLTPP Program
• 20 year program• Collects pavement performance
data• Aprox. 1,914 research test sections
throughout the US and Canada• Joint FHWA, State DOT, Provincial
DOT cooperative program
FACTS about the FACTS about the Long-Term Pavement Performance Program(LTPP)Long-Term Pavement Performance Program(LTPP)
LTPP LTPP DevelopmentDevelopment
Strategic Transportation Research Study
LTPP Planning
Strategic Highway Research Program (LTPP:
$50 Million)
1987-19921987-1992
1985-19871985-1987
19841984
LTPP ProgramLTPP Program
Original ObjectivesOriginal Objectives
• Evaluate existing design methods.• Develop improved design methodologies
and strategies for the rehabilitation of existing pavements.
• Help support the develop of improved design equations for new and reconstructed pavements.
LTPP ProgramLTPP Program
• Determine the effects of loading, environment, material properties and variability, construction quality, and maintenance levels on pavement distress and performance.
• Determine the effects of specific design features on pavement performance.
• Establish a national long-term database to support SHRP’s objectives and to meet the future needs of the highway industry.
Objectives Continued…Objectives Continued…
LTPP ProgramLTPP Program
GPS-1 Asphalt Concrete (AC) on Granular Base
GPS-2 AC on Bound Base
GPS-3 Jointed Plain Concrete Pavement
GPS-4 Jointed Reinforced Concrete Pavement
GPS-5 Continuously Reinforced Concrete Pavement
GPS-6A Existing AC Overlay on AC Pavements
GPS-6B New AC Overlay on AC Pavements
GPS-7A Existing AC Overlay on Portland Cement Concrete (PCC) Pavements
GPS-7B New AC Overlay on PCC Pavements
GPS-9 Unbounded PCC Overlays on PCC Pavements
Gen
era
l Pavem
en
t Stu
die
s
Gen
era
l Pavem
en
t Stu
die
s
(GP
S)
(GP
S)
LTPP ProgramLTPP Program
• Focus on most commonly used pavement designs
• One 500 foot section per location
Primary Factors
Subgrade: fine & courseTraffic: medium & heavy Temp: freeze and non-freezeMoistures: wet and dry
Secondary Factors
AC thicknessAC stiffnessSN of base and subgradePCC thicknessJoint spacing
GPS continued….GPS continued….
LTPP ProgramLTPP Program
Gen
era
l Pavem
en
t Stu
die
s
Gen
era
l Pavem
en
t Stu
die
s
(GP
S)
(GP
S)
Approximately 652 sectionsApproximately 652 sections
LTPP ProgramLTPP Program
SPS-1 Strategic Study of Structural Factors for Flexible Pavements
SPS-2 Strategic Study of Structural Factors for Rigid Pavements
SPS-3 Preventative Maintenance Effective for Flexible Pavements
SPS-4 Preventative Maintenance Effective for Rigid Pavements
SPS-5 Rehabilitation of AC Pavements
SPS-6 Rehabilitation of Jointed PCC Pavements
SPS-7 Bonded PCC Overlays on Concrete Pavements
SPS-8 Study of Environmental Effects in the Absence of Heavy Loads
SPS-9 Validation of SHRP Asphalt Specification and Mix Design (Superpave)
Spec ifi
c Pavem
en
t Stu
die
s S
pecifi
c Pavem
en
t Stu
die
s (S
PS
)(S
PS
)
LTPP ProgramLTPP Program
• Focus on certain pavement engineering factors • Multiple 500 feet sections per location
Primary Factors
Subgrade: fine & courseTraffic: medium & heavy Temp: freeze and non-freezeMoistures: wet and dry
Secondary FactorsAC drainage - yes, noAC thicknessAC base type and thicknessPCCP drainage- yes, noPCC strength and thicknessLane widthBase type
SPS continued….SPS continued….
LTPP ProgramLTPP Program
Sp
ecifi
c P
avem
en
t Stu
die
s ( S
PS
)S
peci fi
c P
avem
en
t St u
die
s (S
PS
)
LTPP ProgramLTPP Program
Approximately 1,262 sectionsApproximately 1,262 sections
Dry FreezeDry Freeze Wet FreezeWet Freeze
Dry No- FreezeDry No- Freeze Wet No- FreezeWet No- Freeze
LTPP ProgramLTPP Program
LTPP ProgramLTPP Program
Pavement Pavement DistressDistress
LTPP ProgramLTPP Program
Profile Profile DataData
SmoothnesSmoothnesss
LTPP ProgramLTPP Program
FWD FWD Structural Structural CapacityCapacity
LTPP ProgramLTPP Program
Traffic LoadsTraffic Loads
Weigh-In-Motion Weigh-In-Motion (WIM)(WIM)
LTPP ProgramLTPP Program
Climatic DataClimatic Data
Environmental Environmental EffectsEffects
LTPP ProgramLTPP Program
LTPP Data LTPP Data CollectionCollection
ClimateClimate TrafficTraffic
MaterialMaterialPropertiesProperties
Pavement Pavement StructureStructure
Pavement Pavement conditioncondition
LTPP ProgramLTPP Program
LTPP ProgramLTPP Program
• Fact about the LTPP Program• LTPP/ASCE Data Analysis Contest• Key Features of DataPave Online• Sample Data Extraction• Other LTPP Products
Scope of PresentationScope of Presentation
LTPP ProgramLTPP Program
• To work with the next generation of pavement engineers. • To work closely with universities, where future research is being conducted.
Why a contest ?Why a contest ?
LTPP ProgramLTPP Program
• In 1998, LTPP/ASCE developed and conducted the first “International LTPP Data Analysis Contest”
• Main catalyst “DataPave”• Since 1998 the contest has been
conducted three additional times
LTPP ProgramLTPP Program
• Usefulness of product and potential benefit to end users,
• Originality of concept, demonstrated use of the LTPP database,
• Organization of paper, and presentation (including clarity and style).
Projects are evaluated based on ….Projects are evaluated based on ….
LTPP ProgramLTPP Program
• Category 1, Undergraduate Students (Individual or team entry)
• Category 2, Graduate Students (Individual or team entry)
• Category 3, Partnership • Category 4, Curriculum
Segmented into four categories ….Segmented into four categories ….
LTPP ProgramLTPP Program
Adoption of LTPP in the Classroom!– Incorporate LTPP data elements
provide real-world applications– Professors are seeking more
meaningful assignments for students and need data to support assignments
– LTPP can provide much needed data
LTPP ProgramLTPP ProgramProfessor Case Study From ContestProfessor Case Study From Contest• Dr. Susan Tighe, University of Waterlou
• USING LTPP FOR EDUCATING TOMORROW'S ENGINEER, 2003 First Place, CURRICULUM CATEGORY
• Drs. Neeraj Buch and Karim Chatti– The Use of the LTPP Database in the Pavement
Engineering Curriculum at Michigan State University, 2002 First Place, Curriculum CATEGORY
• Dr. Shelley Stoffels, Penn State University
LTPP ProgramLTPP Program
• Fact about the LTPP Program• LTPP/ASCE Data Analysis Contest• Key Features of DataPave Online• Sample Data Extraction• Other LTPP Products
Scope of PresentationScope of Presentation
LTPP ProgramLTPP Program
• What's new (Database release announcement)
• Table/Field Navigator• Table Export
Key Features of DataPave onlineKey Features of DataPave online
LTPP ProgramLTPP Program
• What's new (Database release announcement)
• Table/Field Navigator• Table Export
Key Features of DataPave onlineKey Features of DataPave online
LTPP Database…LTPP Database…
MODULES
• Climatic• General• Inventory• Maintenance• Monitoring• Rehabilitation• SMP• SPS (10)• Traffic
TABLES
• Deflection• Profile• Friction• Distress• etc
ELEMENTS
• Date• Time• Temperature• Individual data elements
LTPP ProgramLTPP Program
LTPP ProgramLTPP Program
• What's new (Database release announcement)
• Table/Field Navigator• Table Export
Key Features of DataPave onlineKey Features of DataPave online
LTPP ProgramLTPP Program
• Background of the LTPP Program• LTPP/ASCE Data Analysis Contest• Key Features of DataPave Online• Sample Data Extraction• Other LTPP Products
Scope of PresentationScope of Presentation
LTPP ProgramLTPP Program
• Performance data– Inventory data (layer)– Traffic data– Materials testing– Profile
Sample Data ExtractionSample Data Extraction
54-400354-4004
Layer data
LTPP ProgramLTPP Program
Extracted data
54-400354-4004
Traffic Data
LTPP ProgramLTPP Program
Extracted data
1-01011-01021-0103
Testing Data
LTPP ProgramLTPP Program
Extracted data
1-01011-01021-0103
Profile Data
LTPP ProgramLTPP Program
Extracted data
LTPP ProgramLTPP Program
• Background of the LTPP Program• LTPP/ASCE Data Analysis Contest• Key Features of DataPave Online• Sample Data Extraction• Other LTPP Products
Scope of PresentationScope of Presentation
LTPP ProgramLTPP Program
• LTPP Pavements Online – (1998 AASHTO supplement)
• LTPP WIM Cost• DiVa Online• Other Products online
– LTPPBind 2.1 & 3.1 beta– LTPP faultmeter plans and spec’s– Other
LTPP ProgramLTPP Program
www.fhwa.dot.gov/pavement/ltpp/www.fhwa.dot.gov/pavement/ltpp/datapave.cfmdatapave.cfm
Federal Highway AdministrationAntonio Nieves Torres
Tel. 202-493-3074 [email protected]
Dr. Karim ChattiMichigan State University
Tel. (517) [email protected]
Additional information Additional information on the contest ….on the contest ….
Additional information on LTPP products….Additional information on LTPP products….
Antonio NievesTel. 202-493-3074
[email protected] Central/Western Regions
Mike MoravecTel. 410-962-5623
[email protected] Atlantic/ Southern Regions
LTPP ProgramLTPP Program
Thank you !Thank you !
www.fhwa.dot.gov/pavement/ltpp/index.cfmwww.fhwa.dot.gov/pavement/ltpp/index.cfm
www.datapave.comwww.datapave.com
LTPP ProgramLTPP Program