Pavement Data Collection, Rating History &

Pavement Management Program

in the City of Houston

Presenter: Steve Loo P.E., Managing Engineer

Transportation and Drainage Operations

Texas Municipal League Conference 2019 October 9, 2019

– In the past ~2001-2007, COH evaluated pavement conditions using “Windshield” method.

– Then in ~2008-2014, COH collected pavement data with a pavement data collection vehicle (city-owned).

– Currently since 2015, COH collects pavement data (nation-wide vendor) to generate the PCI: 1) PCI is adopted by APWA (American Public

Works Association). 2) PCI is based on ASTM D6433 published

standard (American Society for Testing and Materials).

3) PCI is a “Numerical Indicator” that rates surface condition of the pavement.

Pavement Data Collection and Rating History

Mobile Asset Collection Van

Global Positioning System (GPS)

5-Laser Profiler Roughness Rutting

Right-of-Way Cameras (typically four)

Inertial Measuring Unit (IMU)

Laser-IlluminatedLinescan Camera (Pavement)

• Videologger for data validation

• ROW and pavement view

• Google street-view integration

Roadway Photo Imagery Log

COH Major Roads PCI Map

COH Major Roads PCI Results

COH Local Roads PCI Map

COH Local Roads PCI Results

http://www.cityofhouston.gov/

PCI Segment Distribution vs. # of Miles

Pavement Surface Type

Pavement Surface Type

Report Distress Types and Distribution

Pavement Distresses/Deterioration Conditions

Faulting Linear Cracking

Divided Slab & Patching Corner Breaks, Divided Slab, Faulting & Patches

Pavement Distresses/Deterioration Alligator Cracking

Patching & Joint Reflection Cracking

Potholes

Edge Cracking

Pavement Condition Index Summary – 2015-2016 RUN

COH Right-of-Way Imagery “Asset Tagging” Curb & Gutter, Sidewalks, Curb

Ramps, Bridge Guardrails, Etc.

– 1) Setup “Street Network Inventory Database” properly on any Enterprise Database System (i.e. Oracle, SQL, etc.)

– 2) Collect “Pavement Condition Data” & Perform “Rating on Pavement Surface Condition (i.e. PCI)”

– 3) Analyze Data, Assemble Plan & Perform Work (i.e. Preservation, Repair, Rehabilitation & Reconstruction)

– 4) Feed-Back Process (Update System)

Basic Pavement Management Steps

Pavement Survey Cycle Street Network

Inventory update Distress Survey

Collect & Generate Physical(PCI)

Functional(IRI) Demand(ADT)

Analyze Data, Assemble Plan & Perform Work (i.e.

Preservation, Repair, Rehabilitation & Reconstruction)

Upload treatment plans, costs, resurvey strategy. Set priority based on needs, funds including cost

STEP 4 - Feedback

STEP 3

STEP 2

• Repeatable methodology

• Pavement distresses are objectively scored based on type, severity, and extent

• Every street is rated with the same standard

• PCI score range is 0 (worst condition) to 100 (best possible condition)

• PCI can be used as a tool/aid to rank streets relative to each other

Additional PCI Information

Know PCI, IRI & ADT DISTINCTIONS

Functional Assessment: IRI (International Roughness Index) •Ride Quality Measurement •Lagging Indicator (generally) •Citizen/Driver’s notice •Important dimension to assess road conditions. It can be used as a tie-breaker in case PCI is same for two segments

Know PCI, IRI & ADT DISTINCTIONS

Demand Assessment: ADT (Average Daily Traffic)

•Maximum return on funds invested •Maximize impact based on road usage. •Try to minimize VOC (Vehicle Operating Costs – damage, trip, down time, increased fuel costs etc.) for the most Citizens.

Average Daily Traffic (ADT):

• PCI provides present condition of pavement surface

• PCI helps determine what treatments and where (right treatment on the right pavement at the right time)

• PCI allows for feedback on maintenance treatments (validation of current practices)

PMP: Why data collection & analysis?

Pavement Decay/

Management Philosophy

TREATMENT PLANS for Asphalt: (Draft-copy)

Third Party Software

• Improve QA/QC procedures • See Effects of Preventive Maintenance Strategies • Help Understand Impact of Pavement Treatments • Justify the Need for Dedicated Funds Key points to remember:

Automate parts of the PMP system, but Can’t Replace the Human Brain! (i.e. PW Judgement) Data-Driven Decision Making Process! Right Treatment Right Pavement Right Time!

Pavement Management Program desired Outcomes:

Pavement Mgmt. Info. System (PMIS) – Street Section/Segment Data Information

2020 2021 2022 2023 2024 Total SINGLE CHIP SEAL 1,358.34 122.28 126.75 58.68 91.36 1,757.41 SEAL CRACKS 2,340.66 2,340.66

MaC Major Collector (5) 262.02 262.02 R Residential/Local 2,078.65 2,078.65

MaC Major Collector (5) 477.66 122.28 126.75 58.68 91.36 876.72 R Residential/Local 880.68 880.68

MILL AND THIN OVERLAY 1,229.96 192.31 180.3 0.07 1,602.64

MaC Major Collector (5) 31.99 4.83 2.44 0.07 39.34 R Residential/Local 1,197.96 187.48 177.86 1,563.30

RECONSTRUCT STRUCTURE (AC) 0.01 0.01 104.95 104.97 MaC Major Collector (5) 0.01 104.95 104.97

R Residential/Local 0.01 0.01

RECONSTRUCT STRUCTURE (PCC) 17.98 161.43 156.43 172.3 78.57 586.7

MaC Major Collector (5) 17.95 7.86 9.76 7.76 4.99 48.31

R Residential/Local 0.03 153.57 146.67 164.54 73.58 538.39 Total 2,606.28 476.02 463.48 230.99 2,615.61 6,392.38 Estimated work in lane miles

Draft 5 Year Plan from Pavement Management Information System to Maintain 70 PCI

Importance of Pavement Preservation, Repairs and Preventative Maintenance

(example scenario)

State of Pavement Infrastructure(Draft/Concept) HOUSTON PUBLIC WORKS-PAVEMENT TREATMENT: ESTIMATED TOTAL NEED BASED ON 2015/2016 PCI

Road Class Pavement Type PCI Range

Treatment Category Lane Miles Planned Treatments

Cost per

Lane Mile

Est. Treatment Total $ Need

MAJORS PCC 86-100 Preserve 1587.5 Do Nothing (regular maintenance activities)

$0

LOCALS PCC 86-100 Preserve 1088.3 Do Nothing (regular maintenance activities)

$0

SUMMARY BY PCI RANGES/TREATMENT CATEGORIES

PCI Lane Miles % Estimated Total $ Needs 86-100

Preserve

4,473.6 31% $7,531,300 $927,375,930

(56%) Repair & Rehabilitation

71-85 Repair 4,551.4 31% $131,728,070 41-70 Rehabilitation 4,264.7 29% $788,116,560 0-40 Reconstruction

1,366.3 9% $721,406,400 $721,406,400

(44%) Reconstruction

TOTALS 14,656.0 $1,648,782,330

State of Pavement Infrastructure (Draft/Concept) PLANNED FOR ANNUAL PERFORMANCE

Maintenance Budget Needed

General overall pothole/skin patching as needed $12,491,600

Subtotal for Preventive, Repair, Rehabilitation $108,608,140

Maintenance Support $8,115,800

Bridge Maint. & Replacement @ 8 per year $17,851,800

Grand Total for one year $134,575,740

State of Pavement Infrastructure (Draft/Concept) HOUSTON PUBLIC WORKS-HISTORY OF MAINTENANCE AND REPAIR:

STREET NETWORK PAVEMENT

FY2015 FY2016 FY2017

PRESERVATION/REPAIRS TOTALS $43,666,704 $42,426,013 $34,274,823

Averaged COH per lane mile maintenance spend $2,737.62

Steady-State COH per lane mile maintenance spend (as proposed) $7,410.49

ICMA Center for Performance Measure (2012) reported nation average per lane mile $3,867.00

State of Pavement Infrastructure (Draft/Concept) LANE MILES BY COUNCIL DISTRICTS

HPW-PAVEMENT CONDITIONS (PCI 2015-2016):

A B C D E F G H I J K Totals Majors 450 590 556 503 300 289 292 410 338 213 406 4346.52

Totals Locals

766 1237 1058 1112 1212 406 726 984 939 328 833 9599.65

Grand Totals

1217 1826 1614 1616 1512 694 1018 1394 1276 540 1239 13946.2