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City of Dallas Infrastructure Management Plan
Rick Galceran, P.E. Director Public Works Dept.
S.A.M.E Infrastructure Forum February 2, 2018
Infrastructure Management Plan • City of Dallas transportation system over 11,700
lane miles of roadways and over 1,400 miles of alleys
• City has prepared a 5-year Infrastructure Management Plan (IMP) for it’s roadway assets
• Staff will work with Council to incorporate other non-technical considerations
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City of Dallas Infrastructure Management Plan
• Ensure the streets and alleys are maintained:
• Effectively – Treatments that meet the street needs at the right time
• Efficiently – Multi-Contractor coordination, utility coordination, economies of scale
• Transparently – What funds are being used and where, what maintenance is schedules and where, what funding is needed do to meet the City goals, how the department is doing in achieving the goals
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City of Dallas Infrastructure Management Plan
Purpose of the IMP
• Historically – Maintenance type and priority determined annually using Pavement Condition Index (PCI) & street type
• Today - Holistic approach identifying maintenace over a 5-years based on Overall Condition Index (OCI) and its degradation curve
• Staff anticipates refinements in future years. 4
City of Dallas Infrastructure Management Plan
Methodology Used to Develop the IMP
• The OCI methodology identifies street repair projects using the following weighted criteria:
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City of Dallas Infrastructure Management Plan
Overall Condition Index (OCI)
Criteria WeightPavement Condition Index + Rideability 80Functional Class 15Lane Miles 5Total Overall Condition Index (OCI) Score 100
Steet Maintenance Criteria - Annual Maintenance Program
City of Dallas IMP - FY 2019
• Pavement Condition Index – 60% weighting are assigned an industry standard index calculated from field collected pavement distress data.
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City of Dallas Infrastructure Management Plan
Overall Condition Index (OCI) Criteria
ConditionA 100 85 ExcellentB 84 70 GoodC 69 55 FairD 54 40 PoorE 39 0 Failed
PCI ClassificationRANGE
*image courtesy of Asphalt Systems Inc.
Rideability – 40% weighting factor based on the International Roughness Index (IRI)
• Roadway Functional Classification – streets are grouped into classes according to the character of service they are intended to provide
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City of Dallas Infrastructure Management Plan
Overall Condition Index (OCI) Criteria (Cont.)
• Lane Miles – streets are weighted based on the number of travel lanes per direction
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City of Dallas Infrastructure Management Plan
Overall Condition Index (OCI) Criteria (Cont.)
Given an improved collector that has a PCI=78.2, and 2 lanes in each direction, the OCI = 77.06
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City of Dallas Infrastructure Management Plan
Sample Calculation of Overall Condition Index (OCI)
Fuctional Class RankingArterial 100
Collector Improved* 75
Collector Unimproved** 60
Local Improved 40
Local Unimproved 25
*Improved = Curba abd gutter; **Unimproved = no curb and gutter FactorRaw Score
Ranking Factor
Adjusted Score
Pavement Condition Index + Rideability 78.2 80% 62.56Functional Class 75 15% 11.25Lane Miles 65 5% 3.25
77.06Final OCI:
Given:
• Future Consideration Possibilities: • Population Density – streets are weighted
based on population census data
• Traffic Counts – cost considerations in future years
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City of Dallas Infrastructure Management Plan
Overall Condition Index (OCI) Criteria (Cont.)
• After identifying street maintenance projects based on OCI’s, the specific repairs are determined using the PCI’s and Functional Classification for each street
• The City utilizes eight repair methods for asphalt and concrete pavements based on decision matrix
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City of Dallas Infrastructure Management Plan
Pavement Treatment Types
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City of Dallas Infrastructure Management Plan
Pavement Treatment Types (Cont.)
Street Repair Decision Matrix
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City of Dallas Infrastructure Management Plan
Pavement Treatment Types (Cont.)
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City of Dallas Infrastructure Management Plan
Pavement Treatment Types (Cont.)
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City of Dallas Infrastructure Management Plan
Pavement Treatment Types (Cont.)
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City of Dallas Infrastructure Management Plan
Citywide 5-Year IMP
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City of Dallas Infrastructure Management Plan
Council District Annual IMP
• Initial focus of the IMP is on the City’s streets and alleys
• Additional City assets such as traffic signals, sidewalks, bike lanes, stormwater facilities, striping, etc. will be added to the IMP over time
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City of Dallas Infrastructure Management Plan
Looking Ahead
Thank You
Questions?
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City of Dallas Infrastructure Management Plan
City of Dallas Infrastructure Management Plan
Rick Galceran, P.E. Director Public Works Dept.
S.A.M.E Infrastructure Forum February 2, 2018