Memorandum
City of Lawrence
Public Works
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TO: |
Mark Thiel, Assistant Director of Public Works |
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FROM: |
Steven M. Lashley, P.E., Project Engineer |
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CC: |
David P. Cronin, P.E., City Engineer Charles F. Soules, P.E., Director of Public Works |
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DATE: |
December 11, 2017 |
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RE: |
Pavement Management Program Update & 2018 Comprehensive Street Maintenance Program - City Manager’s Report
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Program Update
The pavement management program provides Public Works with a tool to maintain an inventory of street pavement, track the respective condition and maintenance work history, and identify budget needs and impacts associated with preservation strategies and asset management. By applying this tool, and with the continued support of the city’s citizens and representatives, the City has seen the implementation of a wide range of maintenance techniques from preventative maintenance measures to major rehabilitation and reconstruction impacting the overall Pavement Condition Index (PCI) and pavement deterioration. The pavement management program aligns with the City Commission strategic plan and critical success factor of innovative infrastructure and asset management.
Positive contributing impacts of the program can be seen through the last several years. However, it is evident through data analysis that overall impact is leveling out and potentially indicating signs of regression that appear to correlate with the street maintenance funding level.
The fourth quarter (Phase 4) of street rating Cycle 4 was completed in 2017 and followed by recent comparative analysis of the new survey data with existing data in the City’s pavement management program. The current overall average PCI is 74.30 and the overall average deterioration rate is +0.44 versus the 2016 PCI of 73.97 and deterioration rate of +0.83.
A comparative impact graph has been included below to provide a visual representation of the street maintenance funding level (represented as total estimated spent for the contracted maintenance year) as it relates to the primary pavement condition indicators over time.
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2018 Street Maintenance Program & Funding
In August 2017, the City commission approved approximately $2.99 million to be utilized for the 2018 Contracted Street Maintenance Program. The pie chart below gives a breakdown of the various funding sources. The “2018 Comprehensive Street Maintenance Program” map is attached to this document. The map includes streets identified for maintenance work such as crack sealing, patching, microsurfacing, mill and overlay, curb and gutter, and internal street maintenance project areas that include concrete and asphalt rehabilitation work. Significant project locations also shown on the map include:
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Staff Coordination & Recommendations
The proposed 2018 program map has been provided to other City departments for review at November 15, 2017 meeting of the Multi-modal Transportation Team. Public Works will coordinate potential conflict locations including scheduling and phasing of projects. Contracted maintenance work will be coordinated with the work performed by the Public Works Street Maintenance Division. This type of collaboration enhances the overall project impact and success.
Bicycle facilities pursuant to the approved bikeway map and approved traffic calming locations have been reviewed in relation to the planned street maintenance work locations and discussed with the Traffic Commission at their December 14, 2017 study session. Complete streets improvements such as the addition of bicycle pavement markings and bike route signs are planned for further review and inclusion at an estimated cost of $50,000. Annually, the maintenance program has incurred costs associated with pedestrian, bicycle, and traffic calming needs. The cost of these types of additional improvements with increasing construction costs presents a challenge to maintain overall street condition progress levels with a result of fewer annual street maintenance projects.
Attachments: 2018 Comprehensive Program Map