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Pavement Management |
| Program Plan: Currently Civil Science is in the process of completing the Pavement Management System to evaluate existing pavement conditions in portions of Twin Falls City as part of the Twin Falls Transportation Master Plan. Civil Science is currently in the initial stages of collecting and gathering data related to the roadways, signs, drainage, illumination, and traffic signals in the Twin Falls Area. Data in the form of pavement condition surveys was collected along selected Twin Falls City arterial, collector, and local roadways in order to obtain a pavement condition index (PCI). The PCI is a numerical indicator which rates pavement surface condition and gives a measure of the present condition of the pavement. When the PCI is monitored over time it provides feedback on pavement performance for validation or improvement of the current pavement design and maintenance procedures. The PCI also aids in pavement life cycle predictions, planning and budgeting for roadway maintenance, and addressing broader roadway system goals. Organization of the pavement condition survey began by dividing the pavement network into branches, sections, and sample units according to the ASTM D 6433 Standard Practice for Roads and Parking Lots Pavement Condition Index Surveys. Pavement condition surveys were performed on key roadways selected by the Twin Falls City Streets Department and excluded roadways maintained by the Idaho Transportation Department. A branch, section, and sample unit was determined, then an inspection of distresses on the pavement surface were performed. Each distress within the sample unit was recorded by its type, severity, and quantity according to the MicroPAVER 6.0 User Manual.
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Data Results to April 2008: The field data collection gathered thus far in Twin Falls includes pavement distress and PCI information on 15 branches, 50 Sections, and 200 sample units (see Pavement Inventory Study Figure). The section with the lowest PCI of 36 was Eastland Avenue between Hillcrest Drive and Addison Avenue. This pavement section contains large areas of high severity block cracking, longitudinal and transverse cracking, and edge cracking. Other distresses present in this pavement section are edge cracking, potholes, bumps, rutting, and patching. The sections with the highest PCI of 100 were Eastland Avenue between Pole Line Road and Candleridge Road and Filer Avenue between Washington Street and Grandview Street. These pavement sections were recently overlayed, chip sealed, or reconstructed.
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