Repaving Master Plan

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Objective

Develop, fund, and implement a Citywide Repaving Plan designed to improve the quality of Port St. Lucie streets in a fiscally responsible manner with consideration for both short and long-term needs.

Abstract

The repaving plan was developed using a need based approach (“worst first”) while providing an equitable distribution of resources annually amongst the four (4) City Council Districts. The program focuses predominately on local streets, but will also occasionally encompass two-lane collector and arterial roadways. Roadways with more than two lanes will be prioritized and included in the capital improvement program (CIP) and are budgeted independently.

How the Plan Works

The City’s streets ideally would be repaved every 15-20 years, but this is not always possible due to budgetary constraints. So, the repaving program attempts to leverage all available funding to optimize the benefits to all City residents while providing equitable distribution amongst all Council Districts. Utilizing the roadway PCI ratings, local streets with lower PCI’s in each Council District are targeted for resurfacing first, assuming the base is still intact and does not exhibit failure. Should the base show signs of failure, the street will be identified for more extensive repairs and rehabilitation and will be considered for the Capital Improvement Program (CIP).

Current funding and estimated annual miles to be paved is shown in Table 1 below. The complete list of streets currently included in the 10-year are incorporated herein as a part of this document as Appendix “A”. The budget and thus annual miles paved is subject to change as additional funding sources are identified. As funding and conditions change, this plan will be reviewed and updated annually.

As pavement ages and base failures begin to occur, maintenance and rehabilitation become much costlier. The 'Pavement Condition Index' image below shows the typical deterioration curve for asphalt pavement as well as relative costs for “Preservation”, “Maintenance”, and “Rehabilitation”. Resurfacing roadways would fall into the “Reactive Maintenance” category and is middle cost range. To extend asphalt life and defer resurfacing costs, thus reducing lifetime asphalt maintenance costs, the repaving plan includes preservation techniques such as rejuvenation. “Pavement Preservation” (PP) can extend the useful life of asphalt pavement for a fraction of the cost of resurfacing if performed at the proper time. The 10-year paving plan currently allocates 10% of the annual budget to PP.

Fiscal Year Budget  Est. Miles Paved 
2017-2018 $1,800,000  21.45 
2018-2019 $2,000,000  19.85 
2019-2020 $2,500,000  25.63 
2020-2021 $3,000,000  28.38 
2021-2022 $3,000,000  36.51
2022-2023 $3,000,000  35.90
2023-2024 $3,000,000  36.52
2024-2025 $3,000,000   34.70
2025-2026 $3,000,000 
33.35
2026-2027 $3,000,000
34.92

Pavement Condition Index

The Pavement Condition Index is a scale that is used to determine the condition of a paved road. A good PCI is between 60 and 70. The City of Port St. Lucie has an average of 65 PCI for all paved roads.

Pavement Condition Index 

Conclusion

The Repaving Master Plan focusing primarily on the maintenance and upkeep of the City’s local roadways, however for the purposes of this Master Plan recommendation all the City’s roadways (arterials, collectors, & local) are being considered. Utilizing a pavement management modeling software, all applicable treatment scenarios (e.g. rejuvenation, milling and repaving, crack seal then milling and repaving, full depth reclamation, full reconstruction) were evaluated to provide the most efficient treatment strategy at the proper time in the pavement life cycle. Based upon the results of these models, maintaining the current citywide average PCI (65) would require approximately $6 Million per year. Approximately $4 Million would be allocated to the resurfacing of local streets and the remaining $2 Million would be allocated to the repair, resurfacing, and rehabilitation of the City’s arterial and collector roadways. With the currently proposed repaving budget (as shown in Table 1), the Citywide average PCI will fall from a 65 to a 55 within 10 years. That means that citywide, the street condition will fall from “good” to “fair”. With the recommended allocation of $6 Million annually (not including cost inflation), the City’s roadways can be maintained in “good” condition for perpetuity.

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