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 Pavement Data Collection and Rating History – 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. Inertial Measuring Unit (IMU) Right-of-Way Global Cameras Positioning (typically four) System (GPS) 5-Laser Profiler Roughness Laser- Rutting IlluminatedLine scan Camera (Pavement) Mobile Asset Collection Van • 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 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 Pothole s Edge Cracking Patching & Joint Reflection Cracking Pavement Condition Index Summary – 2015-2016 RUN COH Right-of-Way Imagery “Asset Tagging” Curb & Gutter, Sidewalks, Curb Ramps, Bridge Guardrails, Etc. Basic Pavement Management Steps – 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) Pavement Survey Cycle Street Network Distress Survey Inventory update STEP 2 STEP 4 - Feedback Collect & Generate Physical(PCI) Upload treatment plans, costs, resurvey strategy. Functional(IRI) Set priority based on needs, Demand(ADT) funds including cost Analyze Data, Assemble Plan & Perform Work (i.e. STEP 3 Preservation, Repair, Rehabilitation & Reconstruction) Additional PCI Information • 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 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): PMP: Why data collection & analysis? • 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) Pavement Decay/ Management Philosophy TREATMENT PLANS for Asphalt: (Draft-copy) Third Party Software Pavement Management Program desired Outcomes: • 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 Mgmt. Info. System (PMIS) – Street Section/Segment Data Information Draft 5 Year Plan from Pavement Management Information System to Maintain 70 PCI 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 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 Cost per Paveme Treatment Lane Est. Treatment Road Class nt Type PCI Range Category Lane Miles Planned Treatments Mile Total $ Need MAJORS PCC 86-100 Preserve 1587.5 Do Nothing (regular maintenance $0 activities) LOCALS PCC 86-100 Preserve 1088.3 Do Nothing (regular maintenance $0 activities) SUMMARY BY PCI RANGES/TREATMENT CATEGORIES PCI Lane Miles % Estimated Total $ Needs 86- Preserve 100 4,473.6 31% $7,531,300 71-85 Repair $927,375,930 4,551.4 31% $131,728,070 (56%) Repair & 41-70 Rehabilitation 4,264.7 29% $788,116,560 Rehabilitation 0-40 Reconstruction 1,366.3 9% $721,406,400 $721,406,400 (44%) TOTALS 14,656.0 $1,648,782,330 Reconstruction 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 4346.52 766 1237 1058 1112 1212 406 726 984 939 328 833 9599.65 Totals Locals 1217 1826 1614 1616 1512 694 1018 1394 1276 540 1239 13946.2 Grand Totals .