City of Dallas Infrastructure Management Plan

Transcription

1 City of Dallas Infrastructure Management Plan S.A.M.E Infrastructure Forum February 2, 2018 Rick Galceran, P.E. Director Public Works Dept.

2 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 2

3 Purpose of the IMP 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 3

4 Methodology Used to Develop the IMP Historically Maintenance type and priority determined annually using Pavement Condition Index (PCI) & street type Today - Holistic approach identifying maintenance over a 5-years based on Overall Condition Index (OCI) and its degradation curve Staff anticipates refinements in future years. 4

5 Overall Condition Index (OCI) The OCI methodology identifies street repair projects using the following weighted criteria: City of Dallas IMP - FY 2019 Steet Maintenance Criteria - Annual Maintenance Program Criteria Weight Pavement Condition Index + Rideability 80 Functional Class 15 Lane Miles 5 Total Overall Condition Index (OCI) Score 100 5

6 Overall Condition Index (OCI) Criteria Pavement Condition Index 60% weighting are assigned an industry standard index calculated from field collected pavement distress data. PCI Classification RANGE Condition A Excellent B Good C Fair D Poor E 39 0 Failed *image courtesy of Asphalt Systems Inc. Rideability 40% weighting factor based on the International Roughness Index (IRI) 6

7 Overall Condition Index (OCI) Criteria (Cont.) Roadway Functional Classification streets are grouped into classes according to the character of service they are intended to provide 7

8 Overall Condition Index (OCI) Criteria (Cont.) Lane Miles streets are weighted based on the number of travel lanes per direction 8

9 Sample Calculation of Overall Condition Index (OCI) Given an improved collector that has a PCI=78.2, and 2 lanes in each direction, the OCI = Fuctional Class Ranking Arterial 100 Collector Improved* 75 Collector Unimproved** 60 Local Improved 40 Local Unimproved 25 *Improved = Curba abd gutter; **Unimproved = no curb and gutter Given: Raw Ranking Adjusted Factor Score Factor Score Pavement Condition Index + Rideability % Functional Class 75 15% Lane Miles 65 5% 3.25 Final OCI:

10 Overall Condition Index (OCI) Criteria (Cont.) Future Consideration Possibilities: Population Density streets are weighted based on population census data Traffic Counts cost considerations in future years 10

11 Pavement Treatment Types 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 11

12 Pavement Treatment Types (Cont.) Street Repair Decision Matrix 12

13 Pavement Treatment Types (Cont.) 13

14 Pavement Treatment Types (Cont.) 14

15 Pavement Treatment Types (Cont.) 15

16 Citywide 5-Year IMP 16

17 Council District Annual IMP 17

18 Looking Ahead 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 18

19 Thank You Questions? 19

20 City of Dallas Infrastructure Management Plan S.A.M.E Infrastructure Forum February 2, 2018 Rick Galceran, P.E. Director Public Works Dept.