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Designing and Implementing a GIS-Centric Pavement Management System for the City of Alexandria, VA
Transmap Corporation614-481-6799 (office) Howard Luxhoj, P.E.President and [email protected](mobile) Craig Schorling, GISPBD/Account [email protected] (mobile)
Presentation Overview
Alexandria City StatisticsThe System Raw Data CollectionDistress Analysis
Leveraging Industry Standards/Technology ToolsESRI ArcGISMicroPAVERASTM D 6433 - 07Consistent Repeatable Inspection Methodology
MicroPAVER ImplementationWhy Additional Inspections Occurred Questions
City of Alexandria StatisticsSituated six miles south of Washington, D.C. along the western bank of the Potomac RiverHome to approximately 140,000 residents (2007 census estimate) 15.2 square miles of land area A population density of 9,200 persons per square mileThe City of Alexandria can be classified as a dense urban city. The City’s Department of Transportation & Environmental Services maintains approximately 270 centerline miles of paved roadways and alleys.
Team Members
Transmap Corporation (Columbus, Ohio) and our partner Timmons Group (Richmond, Virginia) teamed up to implement a GIS Centric Pavement/Asset Management system.Timmons Group headquartered in Richmond, Virginia, is a leader in civil engineering, GIS and Geospatial technology services, surveying, planning, construction management, landscape architecture and environmental services.
The work order management system Alexandria chose to implement data into is Azteca Systems Cityworks. Cityworks is the only GIS-centric Asset Management System available. Created especially for organizations facing the challenge of managing capital assets and infrastructure, Cityworks is uniquely designed to fully leverage your investment in GIS without costly duplication of data, risky synchronization or integration. They chose this system because Alexandria has an established GIS department, and they wanted everything to be GIS Centric.
Azteca Cityworks Contact
Mr. Philip MogaveroNorth East Regional Account Manager(716) [email protected]
"Due to the progressive nature of the City of Alexandria, they wanted to find a system that could leverage all of their GIS data into a work order management system. For this reason, Alexandria chose Cityworks, and as a result a successful implementation is in place."
GIS Centric Pavement Management System
GIS Centric ESRI ArcGIS Pavement CenterlinePCI results on centerlineSample areas defined as polygons
Linear Reference SystemWork orders linked to ArcGISArcGIS Server applications
GIS Focused Everything Transmap does is centered on GIS
Roadway features extracted as GIS layerPCI resultsGeodatabaseArcGIS Server Image viewerSDE Server
ESRI Developers 13 years ESRI Business Partnership Value Added Reseller (VAR)Development Partner Partners on multi-year City of El Paso, TX project
Raw Data CollectionDetailed Surface Crack Analysis
Centerline File in GIS ESRI GeodatabaseNetwork Definition
Network, Branch, Section, and Inspection Family Assignments (Pavements with similar performance characteristics) Pavement Functional Classification (Primary, Secondary) Linear Reference SystemConstruction / Major M&R Dates
Distress AnalysisAlligator Cracking, Edge Cracking, Potholes, Weathering & Raveling, Transverse/Longitudinal, Block Cracking, Patching & Utility Cut, Rutting
MicroPAVER Loading Automated Database Load
PCI CalculationsWeb-Based Results/ Reporting
ArcGIS Server PCI LayerExtents and Location of Distresses
Ad-Hoc ReportingIn MicroPAVERCustom ReportsWeb-Based
Transmap PMS "Our System"
Raw Data/Field Collection
Raw Data Collection Technology6 Device Capable
RSTFWDINODMI
3 Cameras / 1 LiDARResolution
1600 x 1200Dedicated PMS CameraBest Color Profile to Extract AssetsBoth Stereo / Single Image
Approach - Raw Collection ExplainedFull 360 Degree View
(13 ft spacing)
ON-SIGHT VAN
Accurate Condition Assessment RequiredPMS CameraPHP PageImage
Transmap Automation -LiDAR Laser Mounted on Ultra HD Camera
Raw Laser Point Cloud Data
Transmap collects LiDAR data. LiDAR is used for road slope/contour, automated sign detection/emissivity, and overhead bridge height measurements.
Transmap Automation
Distress Analysis
Typical Collection Method ASTM D6433-99 Samples - The lowest order of the defined pavement network. All samples must belong to a network, branch and section. All pavement sections will be divided into 300 foot pieces, with the sample portion taken from the beginning of each 300 foot piece. The length of the sample area will depend on the width of the roadway. Transmap looks at the total width of the roadway on non-divided average roads. In general, the goal is to have sample areas between 1,500 sq. ft and 3,500 sq. ft.
Pavement Management for Airports, Roads, and Parking Lots M.Y.Shahin
Transmap classifies the type of cracking and the extent
Network and Project level (M.Y Shahin)
"For roads and parking lots, it is difficult to justify a high degree of sampling, unless a project-level evaluation is being performed". " To limit the resources required for an inspection, a sampling plan was developed so a reasonably accurate PCI could be estimated by inspecting only a limited number of the sample units in the pavement section".
Transmap Standard is a Network Level pavement evaluation. The standard network level "systematic random" sample unit is 10-25 percent of the total network reviewed. Due to Transmap "systematic random" standard sampling method, we evaluate an average of 28 percent of the total network.
Why Sample? Scott McDonald (Certified MicroPAVER Trainer) says to think of the pavement analysis like a bell curve. Real information is inside the sweet spot. If you measure too little, the appropriate amount of information is not getting attributed to the segment.
This will skew your PCI to be higher. If you measure too much, you're wasting your time (Same Results). Measuring at a specific interval (middle range).
Need to Establish a constant repeatable inspection methodology
Sample same areas every 3 years depending on communities M&R and fundingStart building Life cycle curves for different pavement familiesCommunicate what is really happening to your pavementMaintain flexibilty in adjusting standard inspection approaches and interpretation of PCI values to accomodate local conditions (road geometry, traffic patterns) and M&R strategies
Medium Alligator Cracking Low Alligator Cracking
Distress with Severity Actual MeasuringUnique to a freeze thaw climate,water can enter through various forms of cracking and then re-freeze
MicroPAVER Implementation
Used by over 600 Cities, Counties, Airports
American Society for Testing and Materials (ASTM) standard D6433-99
Standard D6433-99 is the only pavement rating methodology recognized for rating road and parking lot pavements
Full compliance with the Modified Approach to accounting for infrastructure in the Government Accounting Standards Board (GASB) Standard 34
Pavement ManagementExtend the life of your pavementDefend your budget
APWA and ASTM Standards
Pavement Management Life-cycle
Pavement Management ProcessUnderstanding Pavement Condition Score
MicroPAVER Training
Transmap's Trainer - Scott McDonald conducting MicroPAVER™ training.
Two-three day training class Has trained many Transmap clientsCertified MicroPAVER™ trainer at the Technical Assistance Center, Office of Continuing Education, and University of IllinoisInvolved in software development, testing
Network Level ImplementationTransmap loads all the sample locations and analysis data into MicroPAVER in one massive data load.The traditional walk-out method is to load the data one section at a time, while you are collecting distress data.
Web Solutions
Web-Based Solutions- ArcGIS Server
Go to:www.transmap.com/alexandria
Additional Inspections
One-line representation Duplicated inspectionsAnalysis like divided road Off-set for display purposed PCI did change because of additional inspectionsResults were still on par with rest of the City
Due to how Alexandria maintains their M&R, they wanted to have Transmap perform additional pavement inspections on Multi-laned Non-divided roads.
Multi-Laned Non-Divided
What is NextRe-inspection of surface distress every 3 yearsProject level Structural-Falling Weight Deflection (FWD) testingGround penetrating radar (establish asphalt thickness)Core SamplesIRI rut data
Questions?
Thank you for your time.
Transmap Corporation Howard Luxhoj, P.E.President and [email protected] Craig Schorling, GISPBD/Account [email protected] (Mobile) 614-481-6799 (office)
Follow Transmap: twitter.com/transmap facebook.com/transmap
