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

PCIRecommende

dTreatment

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: rcosby@jub.com 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