Center for
Sustainable
Transportation
InfrastructureInternational Symposiumof the 32nd Japan Road ConferenceManagement of Pavement
Assets in Virginia
Gerardo W. Flintsch
Center for Sustainable Transportation Infrastructure, VTTI
10/31/2017

Center for
Sustainable
Transportation
Infrastructure

Content
1. VDOT’s Needs-Based Budgeting Process
2. Pavement Data Collection
3. Pavement Investment Decision Process→ Network-level optimization→ Project Selection
4. Performance Management

5. Concluding Remarks
AdvancingTransportati
on ThroughInnovation

Center for
Sustainable
Transportation
Infrastructure

1. VDOT’s Needs-Based Budgeting Process
 VDOT maintains and operates over

128,000 lane miles of pavements→ Interstate : ~5,500 lane-miles→ Primary: ~22,000 lane-miles→ Secondary: ~100,000 lane-miles
 3rd largest network of state

maintained highways in the US

Center for
Sustainable
Transportation
Infrastructure

Annual Pavement Needs Methodology
 VDOT pavement management business processes use

established asset management principles and policies→ Annual condition assessment• 100% interstate & primary pavements + 20% secondary→ Set performance targets and goals→ Optimization of available funds using pavement

management software→ Performance monitoring and reporting4

Center for
Sustainable
Transportation
InfrastructureVDOT Needs
 Performance targets for VDOT must also perform

pavements and bridges:

services such as→ Pavement Performance→ Snow Removal and• Interstate – 82%• Primary – 82%• Secondary – 65%→ Bridge Performance• All Systems - 92%
 Calculate funding needs tomeet performance measures/targets for a sustained
program

Emergency Operations→ Routine Maintenance→ Incident Response→ Drainage→ Traffic Operations Center – 24hour service→ Mowing
5

Center for
Sustainable
Transportation
Infrastructure

VDOT Needs and Budget

FY 2016 VDOT Annual Needs and Preliminary Proposed
Allocations For Existing Infrastructure ($ Millions)
Preliminary
Preliminary
Proposed
Proposed M&O
Construction
Allocations
Allocations*

Total
Preliminary
Proposed
FundingDifference
betweenNeeds andAllocations

Description

Annual
VDOT
Needs

Roads

876

398

78476(400)Bridges

832

187

145

332(500)

Other
Services andRepairs

1,380

973

7979(401)

Total$3,088$1,558$229$1,788($1,301)

Center for
Sustainable
Transportation
Infrastructure

VDOT Anticipated FY 2016 Funding
Distribution ($ Millions)Roads

Pavements
UnpavedRoads,
Shoulders,
PotholesCenter for
Sustainable
Transportation
Infrastructure

2. Pavement Management Data Collection
 Automated data collection contracted out Yearly data collection scope (VDOT Maintained):→ 100% of interstate pavements→ 100% of primary pavements→ Approx. 20% of secondary pavements
 Primary Extensions (maintained by towns and localities) since 2014

 All NHS routes (required for Federal Reporting) High focus on quality data – Independent verifications

Center for
Sustainable
Transportation
Infrastructure

Data Collection Vehicle
Pavement
Photolog• Image recognition software• Strobe-lit pavement video• Roughness• Texture• Rutting• Surface Distress• Ground Penetrating Radar• Single view
• Panoramic view
• 1300 x 1030 pixel• 1920 x 1080 (HDTV)• Direct-to-digital• Custom angles

Geometry & Spatial• Inertial measurement unit
• HPMS curve type
• Long. Grade• Cross slope• Centerline mapping• Spatial referencing for GISintegration

Assets• Inventory from imagery• Location determined• Offset measured• Height and width measured• Sign code recorded• Condition assessment

Center for
Sustainable
Transportation
Infrastructure

Ongoing Enhancements
Traffic Speed Deflectometer (TSD) Continuous deflections for the Interstateand primary roads
 Enhanced project selection decision tree

Continuous Friction Measurement Equipment


FHWA Pavement Friction Management SupportProgram

SPFi = 𝑒 𝛽0+ 𝑗 𝛽𝑗 𝑋𝑖𝑗 +𝜀Empirical Bayes Estimation
 B/C Estimations
Center for
SustainableTransportation
Infrastructure

3. Pavement Investment Decision Process
Central office

Maintenance Districts

 Network level decision making

 Project level decision making

 Network optimization

 Project selection

 Allocates funding Rehabilitation design Sets paving targets

 Recording pavement work Condition data collection

 Homogeneous sectioning

 LRS management

 Develop paving schedules –work program Construction management

Center for
Sustainable
Transportation
Infrastructure

Pavement Condition Assessment
Pavement Condition
Category based on CCI

Based on International
Roughness Index (IRI)→ Excellent (≥ 90)→ Excellent (< 60)→ Good (Between 70 and 89)→ Good (Between 60 and 99)→ Fair (Between 60 and 69)→ Fair (Between 100 and 139)

→ Poor (Between 50 and 59)→ Poor (Between 140 and 199)

→ Very Poor (≤ 49)→ Very Poor (≤ 200)

 ‘Poor’ and ‘Very Poor’ pavements are termed as ‘Deficient’SufficientCenter for
Sustainable
Transportation
Infrastructure

Pavement Performance Targets
 Pavement Performance Targets:→ Interstate: at least 82% sufficient→ Primary: at least 82% sufficient→ Secondary: at least 65% sufficient VDOT currently meets

performance targets on
the interstate and primarysystems but not on thesecondary
systemCenter for
Sustainable
Transportation
Infrastructure

Repair Categories
Preventive Maintenance (PM) Restorative Maintenance (RM)
→ Minor Patching <= 2” Depth• < 5% pavement area

→ Heavy Patching <= 9” Depth• < 20% of pavement area

→ Surface Treatment→ FDP and up to 4” Overlay→ Thin Overlays up to 1”→ Milling and up to 4” Overlay

Corrective Maintenance (CM) Reconstruction (RC)→ Moderate Patching <= 6” Depth• < 10% of pavement area
→ PDP and thin (<= 2”) Overlay→ <= 2” Milling and <= 2”Overlay→ Mill, Break and Seat and Thick

Overlay→ Reconstruction→ FDR

Center for
Sustainable
Transportation
Infrastructure

Unconstrained Needs Analysis
 Decision matrix rules for triggering treatments
 Provides section-by-section treatment and cost

regardless of available funds
 Assists districts in making project level selections
 Factors include:→ Distresses Collected (Pavement Condition)→ Pavement Age, Pavement Structure, Traffic Levels

Center for
Sustainable
Transportation
Infrastructure

Optimization Analysis
 Network Level Scenarios (Multi-Constraint)→ Maximize benefit objective→ Budgetary & condition (CCI) constraints→ Multi year,→ Multi objective

 District Specific Route Classification

Specific(Interstate, Primary,Secondary)

Center for
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Infrastructure

Project Selection
 Decentralized to the district level District pavement manager work with residency engineers toselect specific sections and interventions→ Often differ fromnetwork-level recommendations
 Must meet “optimized”

performance targets

Center forSustainable
Transportation
Infrastructure

4. Performance Measures

AdvancingTransportati
on ThroughInnovation

http://dashboard.virginiadot.org/Pages/
Maintenance/Bridge.aspx

Center for
Sustainable
Transportation
Infrastructure

District Level Performance Reporting Process Based on Optimization, set Baseline Targets→ % Sufficient→ Repair Category Lane Miles Compare Planned Projects vs. Actual Targets→ Optimization Results vs. District Planned Projects→ Unconstrained Results vs District Planned Projects
 Report differences in results
 Provide Districts with opportunities for course correction
 Finalize Project Lists and Performance Reports

Center for
Sustainable
Transportation
Infrastructure

Sample Report

DistrictProjectSelections
Optimization
Analysis
Results

Center for
Sustainable
Transportation
Infrastructure

5. Concluding Remarks
 Adopted Asset Management practices in the 1990’s
 Clearly defined performance targets

 Clearly defined business processes (for decision support)
 High quality data
→ Pavements → bridges → other assets
 Two stage decision making process (supported by state of the art software)→ Network optimization (central) → Project selection (decentralized)
 Emphasis on communication of performance targets andmeasures to “all” stakeholders
21Center for
SustainableTransportation
Infrastructure

Credits
Virginia DOT
 Garrett Moore, Chief Engineer
 Tanveer Chowdhury Raja Shekharan Matthew Ayotte Akyiaa Morrison
 Brian Diefenderfer

AdvancingTransportati
on ThroughInnovation

Aaron D. Gerber, Kercher
Engineering Eric Perrone, AgileAssets
 Samer Katicha, VTTI
 Edgar de Leon, VTTICenter for
Sustainable
Transportation
InfrastructureInternational Symposiumof the 32nd Japan Road ConferenceManagement of Pavement
Assets in Virginia
Gerardo W. Flintsch
flintsch@vt.edu