welcome and overview of vtti center for sustainable

Welcome and Overview of

VTTI Center for Sustainable

Transportation Infrastructure

Virginia Polytechnic Institute and State University

Charles E. Via Jr. Department of Civil Engineering

Gerardo W. Flintsch Director, Center for Sustainable transportation Infrastructure

Professor of Civil and Environmental Engineering

Outline

1. Introduction to

CSTI

2. Examples of Past,

Current &

“Developing” Projects

3. Sustainable

Pavements

Center for Sustainable Transportation Infrastructure

Part 1 – Introduction Center for Sustainable Transportation

Infrastructure

VTTI’s Mission

Conduct transportation research with the goal of:

Saving Lives

Saving Time

Saving Money

Second largest transportation institute in the U.S.

Federal 68%

Private 15%

State7%

Federal Flow Through

10%

VTTI

Established in August 1988 by US DOT as a

University Transportation Center

Largest university-level research center at Virginia

Tech

More than 300 faculty,

staff and students

Working on over 150 projects

$80 Million Awarded

$22 Million in Annual Expenditures

Largest supporter of both

undergraduate and graduate students

Center for Sustainable


VTTI Research Areas

Human Factors and Safety

(naturalistic studies)

Transportation Technology

Sustainable Transportation

Infrastructure (CSTI)

Traffic and Mobility

Injury Biomechanics

Transportation Policy

Product Development

CENTER FOR SUSTAINABLE

TRANSPORTATION INFRASTRUCTURE

Partnership between the Virginia Tech

Transportation Institute (VTTI) and the Via

Department of Civil and Environmental

Engineering (CEE) Transportation

Infrastructure and Systems Engineering

(TISE) Program

Looking for solution to the

Infrastructure Challenges


CSTI Vision

A worldwide leader in transportation

infrastructure research and education

Conduct high-impact research for accelerating the

renewal, increasing safety, reducing life-cycle

costs, and ensuring sustainability of

transportation infrastructure systems

Be a paradigm of collaboration among

governments, academia, and industries

Provide excellent environment, resources, and

instruction for students to learn fundamental

concepts, acquire advanced knowledge, and gain

practical experience

Laboratories

The Virginia Smart Road

SuperPave binder test equipment

HMA characterization / performance

Dynamic modulus, resilient modulus, creep

compliance, fatigue, low temperature and

rutting evaluation

Mobile Load Simulator (MLS)

Non-destructive Testing & Sensing

Technologies



10

Virginia Smart Road

VTTI labs


Main Research Objectives

Design and construct pavements with minimum

life cycle cost

Build safe, smooth-riding, silent, and durable

pavements

Provide more accurate assessment of the

infrastructure structural health

Improve investment decisions by providing

better asset data & decision-support tools

Make our transportation infrastructure materials,

systems and programs more sustainable


VIRGINIA SUSTAINABLE PAVEMENTS

RESEARCH CONSORTIUM

Collaboration to advance the state of

pavement engineering in the commonwealth,

the United States, and the World

Focus on strategically selected high-

impact research projects on pavement

materials, performance, design,

maintenance and management

Excellent partnership to pursue national

and international funding opportunities

VA-SPRC – Benefits

Allowed for competing for large-scale

national projects

High ROI / benefit-cost ratio

→ Seed investment of ~$600K (plus several

VDOT-sponsored projects)

→ Attracted > $4.2 M since FY07 in external

research funding

→ While producing cost-saving, practical,

implementable outcomes for VDOT


Part 2 – Example of Projects

Past, Current & “Developing”


Smart Road Pavement Research

ME Pavement Design


Asphalt Materials Characterization in Support

of Implementation of the MEPDG

Full hot-mix asphalt (HMA) characterization

to support the implementation of

mechanistic-empirical pavement design

procedures in Virginia.

0

5000

10000

15000

20000

25000

1.E-05 1.E-03 1.E-01 1.E+01 1.E+03 1.E+05 1.E+07

Reduced frequency (Hz)

|E*

| (M

Pa)

Measured

Fit

0

10

20

30

40

50

60

70

80

90

100

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5

Displacement (mm)

Load

(kN

)

0°C

5°C

20°C

30°C

40°C

1.E-12

1.E-11

1.E-10

1.E-09

1.E-08

1.E-07

1.E-03 1.E-02 1.E-01 1.E+00 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06

Reduced time (s)

Cre

ep c

om

pli

ance

(P

a-1)

Longer lasting pavements?

Application of Digital Images to measure

HMA Uniformity

Center for Sustainable Transportation Infrastructure, VTTI


PAVEMENT SURFACE PROPERTIES

CONSORTIUM A Research Program at the Virginia Smart Road

$1,5M program focused on enhancing the level of service provided by the roadway transportation system through optimized pavement surface texture characteristics

http://www.dot.state.pa.us/internet/web.nsf/PennDOTHomepage?OpenFrameSet

http://www.dot.state.sc.us/

Pavement Surface Properties

Consortium – Current Projects

Organize annual equipment

“rodeos”

Seasonal monitoring

Evaluation of new technologies

Evaluation of high-friction systems

IFI (International Friction Index) Implementation

Continuous Friction Measurements

Technology Deployment

Development of new technologies

Example of Evaluation of New Technologies:

High-Friction Surfaces

Identification of Products and Sites

Construction and Installation Data

Collection

Constructability and maintainability

Field Evaluation

Friction (DFT & Griptester)

Macrotexture (CTMeter)

Cost / benefit analysis

Now approved as low-cost

safety counter-measure


Splash–Spray Assessment Tool

Development Program

Occlusion Factor

Model Development

→ Validation

→ Threshold Criteria

→ Technology Transfer

FHWA DTFH61-08-R-00029

http://www.pavementsolutions.com/index.html

Development and Demonstration of

Pavement Friction Management Programs


Objective:

Determine criteria and develop methods, for

establishing investigatory (desirable) level and

intervention (minimum) levels for friction and

macro-texture for different friction demand

categories or classes of highway facilities for at

least four states.

Assist at least four states in developing PFM

Programs.

Demonstrate state-of-the-art friction (and macro-

texture) measurement equipment.

DTFH61-09-R-00035

Field Support for VDOT Quiet

Pavement Implementation Program


Control (A)

Conctrol (C)

90.0

92.0

94.0

96.0

98.0

100.0

102.0

104.0

106.0

PFC 12.5 AR-PFC 9.5 NGCS PFC 9.5 SMA 9.5 CDG Trans. TinedPCCP

OB

SI

(dB

A)

http://www.vtti.vt.edu/

conferences/PE_2010.php

7th Symposium on Pavement Surface

Characteristics SURF 2012

Smooth, Safe, Quiet, and Sustainable Travel

through Innovative Technologies

Norfolk, VA,

September, 19-21, 2012

http://www.vtti.vt.edu/

conferences/surf-2012.php

SHRP 2 R06 (F) Development of

Continuous Deflection Device

vh

vv

Slope

Slope = Vv/Vh

Slope = Vv/Vh

M J J A S O N D J F M A M J J A S O N D J F M A

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Task 1: Literature Review

Task 2: Interviews State DOTs

Task 3: Obtain Sample Data /

Explore Field Evaluations

Task 4: Field Evaluation Plan

Task 5: Phase I Interim Report

Project panel review

Task 6: Field Evaluation

Task 7: Data Analysis

Task 8: Draft Final Report

Project panel review

Task 9: Final Report

TASK

2009 2010 2011

Phase II

Phase I

1 2

3

4

5

6, 7, 8

9, 10,11,14

12

13

0

2

4

6

8

10

12

14

105 110 115 120 125 130 135 140

RW

D D

efl

ecti

on

(m

ils)

Mile Marker

RWD Deflection (0.1 mile avegrage) Moving Average

Sectioning (based on last resurfacing)

RWD

0.000

0.100

0.200

0.300

0.400

0.500

0.600

0.700

0.800

0.900

1.000

0 500 1000 1500 2000 2500 3000 3500 4000

Def

lect

ion

Slo

pe

[mm

/m]

Chainage [m]

10m averages

100m averagesTSD

Development of a Network-Level Pavement

Structural Capacity Index

Developed tools to analyze pavement structural

capacity at the network level

1. Network-level “structural” pavement condition index

2. Framework to specify structural capacity thresholds

based on non-destructive evaluation and analysis.

3. Algorithm to scope pavement projects at the network

level


0 50 100 150 200 250 3000

0.5

1

1.5

2

2.5

3

3.5

4

Milepost

Mod

ified

Str

uctu

ral I

ndex

Interstate 81 Northbound

A B C D

E

FG

50

60

70

80

90

100

0 1 2 3 4 5 6

CC

I

Year After Treatment (CM in This Case)

VDOT Prediction Greater Than 1 Less Than 1

Average MSI 1.33 Average MSI 0.85

c = 1.253

c = 1.317

𝐶𝐶𝐼 𝑡 = 100− 𝑒𝑎−𝑏∗𝑐𝐿𝑁

1𝑇

Linking Asset Management Data

Collection with Decision Making 1. Investigate how data

collection is linked with

decision processes –

especially at the Project

Selection level

2. Propose a framework

for effective and

efficient data collection

to support Project

Selection decision


Multi-criteria Network-Level Optimization

Models for Pavement Preservation Programming

Reflect agency goals &

performance targets

Handle multiple

objectives

Considers probabilistic

constraints

Easy to understand and

simple to implement

43.4

50.5

53.5

56.0

57.4

58.2

58.0

58.8

58.6

59.3

21.7

16.9

16.2

16.6

17.3

17.8

18.1

18.2

18.4

18.6

9.8

6.6

4.3

1.3

0.0

0.0

0.0

0.0

0.0

0.1

26.0

26.0

26.0

25.2

24.0

23.9

23.0

23.0

25.2

22.0

0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0

1

2

3

4

5

6

7

8

9

10

Year

Percentage(%)

Excellent

Good

Fair

Poor

Preservation

Cost/Benefit

Network & Local

ImportanceOverall Condition

Appropriate Group Prioritization

Group 1 Group 2 Group 3 Group 4

Outreach/ Service Example: Implementing a Pavement

Management System for Christiansburg, VA

Worked with municipal engineers to determine

pavement condition following the PCI procedure

Implemented a municipal Pavement Management

System using MicroPAVER

PMS analysis showed that pavement condition

improved with the a preventive maintenance

program 2012 PCI 2031 PCI

Without

PM

With

PM

Without

PM

With

PM

Bu

dget

$1,000,000 73 76 55 64

$750,000 73 76 48 57

$500,000 72 75 45 49

Developing Area Example 1: A Sustainable Multi-Objective

Cross-asset Infrastructure Management

Objective: To develop

a framework for

optimizing the

decision-making,

management, and

funding process

across several assets

considering multiple

objectives

(sustainability) and

constraints

Developing Area Example 2: Probe Vehicles for Road

Infrastructure Health Monitoring

Objective: To use data collected from probe vehicles

to extract information that could be used to remotely

and continuously determine

road infrastructure health

Pavement Assessment

and Management

Applications Enabled

by the Connected

Vehicles

Environment –

Proof-of-Concept


Developing Area Example 3: Accelerated

Pavement Testing

To test new design and concepts before field

implementation

Significant quantifiable benefits have been

reported by the users

Potentially linked with a National Center for Pavement

Recycling and Reclaiming

Part 3 – Sustainable Pavements

DATABASE

INV

EN

TO

RY

CONDITION

USAGE

MAINTENANCE STRATEGIES

INFORMATION MANAGEMENT

NETWORK-LEVEL ANALYSIS

TOOLS

PROJECT LEVEL ANALYSIS (Design)

WORK PROGRAM

EXECUTION

PERFORMANCE

MONITORING

FEEDBACK

CONDITION ASSESSMENT

PRODUCTS

NETWORK-LEVEL

REPORTS Performance Assessment Network Needs Facility Life-cycle Cost Optimized M&R Program Performance-based Budget

CONSTRUCTION

DOCUMENTS

GRAPHICAL

DISPLAYS

NEEDS ANALYSIS

PRIORITIZATION / OPTIMIZATION

PERFORMANCE PREDICTION

PROGRAMMING PROJECT SELECTION

Goals & Policies System Performance Economic / Social &

Environmental

Budget Allocations

STRATEGIC ANALYSIS Pavement

Management Economic, Social

and Environmental

Impacts

What is a “Sustainable” Pavement?

Safe

Healthy

Affordable

Renewable

Operates fairly

Limits emissions

Limits use of resources

Optimized surface properties

Long lasting, well preserved

Life-cycle cost analysis (LCCA)

Maximize reuse & recycle

Asset management

LCA-optimized

materials,

processes, &

policies


A first attempt to define Source: Sustainable Pavements, Flintsch (2010) Tempe, AZ

INTERNATIONAL SUSTAINABLE

PAVEMENT PARTNERSHIP

http://www.vtti.vt.edu/ISPW/ISPW-2010.html

Research Agenda for Sustainable

Pavements 1. Sustainability Assessment Methods

1.1 Indicators

1.2 Sustainability Rating System

1.3 Sustainability Decision Support Tools

2. Innovation

2.1 Financing and Risk

2.2 New Products

2.3 Standard Testing/Certification Practices/ Protocols

3. Dissemination

3.1 Best Practice

3.2 Policy Makers and the Public



Assessing Sustainability: Pavement Construction

and Network Sustainability Management Pavement

Dwight David Eisenhower Transportation Program Grant for Research Fellowship (GRF)

Objective:

To develop a decision-support

methodology to reliably evaluate

and compare the sustainability

impacts of highway pavement

design, preservation, and renewal

alternatives

Life Cycle Assessment of Sustainable Road Pavements:

Carbon Footprinting and Multi-Attribute

Analysis

Assess the environmental impacts

of road-related practices, strategies,

and materials

Implement a procedure to include these

eco-efficiency values into a more

comprehensive decision support system


Evaluation of

alternatives/

strategies

Optimal

Strategy Performance

Environment

Costs Multi-

Attribute

optimization

Network level

Project level

High RAP High Binder Asphalt

Concrete Mixes

To investigate the effect of increasing the

amount of binder content on performance of

high RAP surface mixtures (40% and more).

Compare no Rap, 25%, 40% RAP (and 100%

RAP)

Dynamic Modulus, Beam fatigue, Flow

Number, APA and Permeability


National Sustainable Pavement

Consortium

Pooled-Fund TPF-5(268)

Objective: enhancing pavement sustainability

Identification and evaluation of novel products,

practices, and pavement systems

Best practices for sustainable pavement management

Climatic changes adaptation

http://www.dot.state.pa.us/internet/web.nsf/PennDOTHomepage?OpenFrameSet

National Sustainable Pavement Consortium

Current Projects

Started:

1. Consideration of the Use Phase in the

Pavement Life-Cycle Assessment

2. Measuring the Benefits of Emerging

Materials and Construction Processes

Part 1: Pavement Recycling Project

Selection Guidelines

Upcoming: Use of LCA in pavement-type

selection


Related Initiative:

NATIONAL PAVEMENT RECYCLING AND

RECLAIMING CENTER

Objective: To develop an independent

research group that will be the resource

of choice for government and industry

for conducting basic and applied

research, technology transfer, training,

and implementation support on

pavement recycling, reclaiming, and

reusing technologies and solutions.


National Pavement Recycling and Reclaiming Center

Vision

World-class research and technology transfer

facility that:

Conducts high-impact research for

accelerating the implementation of more

sustainable pavement solutions through

pavement recycling and reclaiming

technologies

Is a paradigm of collaboration among

government, academia, and industry


National Pavement Recycling and Reclaiming Center

Vision (cont.)

Provides excellent environment, resources, and

instruction for practitioners and students to

learn fundamental concepts and gain practical

experience and know-how on pavement

recycling and reclaiming technologies

Provides pavement design professionals and

public agencies with the knowledge and tools

necessary to use pavement recycling and

reclaiming as a feasible and competitive

alternative to traditional pavement preservation

and rehabilitation strategies


Questions?

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