n orthwest gis u sers g roup c onference – o ctober 20, 2011 dynamic gis-based pavement condition...
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NORTHWEST GIS USERS GROUP CONFERENCE – OCTOBER 20, 2011
Dynamic GIS-based Pavement Condition Tracking
NORTHWEST GIS USERS GROUP CONFERENCE – OCTOBER 20, 2011
Pavement Management
BIG PICTURE• Save time and money
through more effective management of road assets.
• Enable graphical visualization and analysis of pavement conditions.
• Map your street system• Keep inventory• Track work histories• Attach photos, plans, etc.• Create reports
NORTHWEST GIS USERS GROUP CONFERENCE – OCTOBER 20, 2011
Methodology
• Many “Schools of Thought” in Pavement Inventory– “Do Nothing” Plan– Calculated Pavement Management Plan – “Do Something!”
• PCI (Pavement Condition Index)– Grade represents a scale of current pavement
condition– Usually rated as a percentage – 0 to 100
GoverningDistress and
Other Distresses
PCIRecommended
Treatment
Estimated Treatment
Costs
NORTHWEST GIS USERS GROUP CONFERENCE – OCTOBER 20, 2011
Planning Road Treatments
$$$ $$$$ Excellent
Good
Fair
Poor
Failed
Maintenance:Crack Sealing ($)
Preventative Maintenance:Chip Sealing; Microsurfacing ($$)
Rehabilitation:Overlays ($$$$)
Major Rehabilitation::Mill and Overlay; Reconstruction ($$$$$$)
0 20
100
PCI
Years
The cost to repair a roadway becomes greater with time. The rate of deterioration is exponential
NORTHWEST GIS USERS GROUP CONFERENCE – OCTOBER 20, 2011
Mountain Home – Case Study
• Doesn’t want to implement additional systems or new software tools.
• Integrate the street department’s information with the city’s GIS system.
• Share with department heads and other departments city-wide.
• ASTM International – PCI methodology• Steps for PCI Calculation:
– Inventory Roads– Come up with raw deduct values– Determine final deduction value– Subtract from 100 to get final PCI
NORTHWEST GIS USERS GROUP CONFERENCE – OCTOBER 20, 2011
Inventory Roads
• Measure road cracking in the field– Severity – High,
Medium, Low– Extent – Percentage
of sample that has covered in each type of distress
NORTHWEST GIS USERS GROUP CONFERENCE – OCTOBER 20, 2011
Calculate Raw Deduct Values
• Use charts to find raw deduct values for each distress based on its extent and severity
NORTHWEST GIS USERS GROUP CONFERENCE – OCTOBER 20, 2011
Calculate the PCI
NORTHWEST GIS USERS GROUP CONFERENCE – OCTOBER 20, 2011
Examine the Results
NORTHWEST GIS USERS GROUP CONFERENCE – OCTOBER 20, 2011
The Process
…analyze and report the results in the officeUpdate conditions in the field…
NORTHWEST GIS USERS GROUP CONFERENCE – OCTOBER 20, 2011
GIS in Pavement Management
UpdateRoad
Network
PavementInventory
RecommendedTreatments
Planning andBudgeting
RoadImprovements
GIS
NORTHWEST GIS USERS GROUP CONFERENCE – OCTOBER 20, 2011
Q & A
Ryan CosbyGIS SpecialistGateway Mapping, Inc.250 S. Beechwood St. Suite 201 Boise, ID 83709p: 208 376.7330 | c: 208 419.8567 | e: [email protected] THE J-U-B FAMILY OF COMPANIES:
www.jub.com | www.gatewaymapping.com | www.langdongroupinc.com Gateway Mapping software and services:www.spatialgenerations.com | www.namesinstone.com | www.spatialim.com