05/29/19 City Council Agenda Packet - Work Session

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PAVEMENT MANAGEMENT SYSTEM Public Works has used Paver since 2013as its pavement management system. Pavement Management System(PMS) programsanalyzecollected rating data and process the data to provide reportson the current and projected conditions of the street system.In addition,the programisused to evaluate the effectiveness of planning and funding priorities andprovides guidance in the decision-making process.A primary goal, through judicious maintenance,is to prevent pavement failuresin the most efficient means based on selected parameters. Pavement Inspection Frequency Two predominant work efforts required to maintain the PMS are; updating the street inventory, and performing the annual inspection of surface conditions. City streets are divided into sections based on their Functional Classification (FC), pavement type, and geometricdesign. Sections are the basic unit for evaluating streets and surface conditions. A sections is defined as a portion of a street with a beginning and ending description. Changes in geometric features are used as a guide for determining sections. Examples of geometric differences are the surface type, section width, surface age, and extent of past rehabilitations.Public Works currently manages over 6100 street sections. Field inspections are conducted by pavement raters who walk each street section evaluating the pavement surface for signs of distress. Arterial and collector streets are inspected annually, residential streets are inspected on a three-year cycle,and off-street shared-use path and improved alley inspections are completed on a two-year cycle. This year, staff inspected 171 miles of arterial and collector streets,117miles of local streets in the West Eugene and Downtown areas,plus 14miles of improved alleys throughout the city. Pavement Condition Index (PCI), Deduct Values, and Distresses Pavement distresses are dependent on pavement type and are rated by severity and extent. Paver provides a numerical value (PCI) calculated internally based on deduct values for the distresses rated per street section. A street with a PCI of 100 represents a new or recently rehabilitated street. This PCI value is the basis used to analyze the surface treatment needs. Distress data are collected using Tablets and then uploaded to the pavement management software. Paver method rates severities and all their extents for up to 20 different distresses.As the condition of a streetssurface begins to deteriorate,the PCI decreases. Asphalt distresses typically observed are alligatoring, longitudinal and transverse cracks, rutting, and raveling. Distresses in concrete streets typically observed and rated include cracks per panel, raveling, joint spalling, faulting, and crack sealing. Descriptions of some common distresses are shown below: 6 May 29, 2019, Work Session - Item B