ltpp program presented to the acpa professors workshop skokie, il june 19, 2008 long-term pavement...

LTPP ProgramLTPP Program

Presented to theACPA Professors Workshop

Skokie, IL June 19, 2008

Long-Term Pavement Performance ProgramLong-Term Pavement Performance 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


• 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


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.


• 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…


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)


• 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….


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


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

)


• 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….


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

)


Approximately 1,262 sectionsApproximately 1,262 sections

Dry FreezeDry Freeze Wet FreezeWet Freeze

Dry No- FreezeDry No- Freeze Wet No- FreezeWet No- Freeze


Pavement Pavement DistressDistress


Profile Profile DataData

SmoothnesSmoothnesss


FWD FWD Structural Structural CapacityCapacity


Traffic LoadsTraffic Loads

Weigh-In-Motion Weigh-In-Motion (WIM)(WIM)


Climatic DataClimatic Data

Environmental Environmental EffectsEffects


LTPP Data LTPP Data CollectionCollection

ClimateClimate TrafficTraffic

MaterialMaterialPropertiesProperties

Pavement Pavement StructureStructure

Pavement Pavement conditioncondition



• 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 ?


• 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


• 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 ….


• 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 ….


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


• 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



• What's new (Database release announcement)

• Table/Field Navigator• Table Export

Key Features of DataPave onlineKey Features of DataPave online


• Background of the LTPP Program• LTPP/ASCE Data Analysis Contest• Key Features of DataPave Online• Sample Data Extraction• Other LTPP Products



• Performance data– Inventory data (layer)– Traffic data– Materials testing– Profile

Sample Data ExtractionSample Data Extraction

54-400354-4004

Layer data


Extracted data

54-400354-4004

Traffic Data


Extracted data

1-01011-01021-0103

Testing Data


Extracted data

1-01011-01021-0103

Profile Data


Extracted data


• Background of the LTPP Program• LTPP/ASCE Data Analysis Contest• Key Features of DataPave Online• Sample Data Extraction• Other LTPP Products



• 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


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


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 program presented to the acpa professors workshop skokie, il june 19, 2008 long-term pavement...

Documents

concrete pavementssps

ac pavementsgps

pavement distress

asphalt concrete ac

ltpp programdetermine

ltpp programpresented

aexisting ac overlay

bnew ac overlay