2018-013 Council Resolution - Laserfiche WebLink

Home Search

WSB Pavement Management Report Page 13 III. PAVEMENT CONDITION REPORT EXISTING PAVEMENT CONDITION Pavement Condition Index (PCI) was used to measure pavement condition on a scale from 0 to 100, with 100 being a perfect roadway with no distress. This report provides the latest pavement conditions. PAVER, which is an asset management software, was used to record and estimate the conditions of the roadways. The software calculates the PCI using the deduct values, which are based on the distress type, distress severity, and distress quantity. Examples of distress type are alligator cracking, pothole, and rutting. Distress severity is divided into low, medium, and high. Distress quantity is either the number of counts, length, or area depending on the distress type. Majority of the bituminous roadway systems at the time of inspection are in good condition, and are in need of maintenance to preserve the road structure. The following is the breakdown of the pavement overall condition in the City: Pavement Condition Index Mileage Percent of System Adequate Category (70.01-100.00) 59.8 62.8 Marginal Category (40.01 — 70.00) 21.9 22.8 Problem Category (0.00-40.00) 15.6 14.4 Pavements that fall into the adequate category are recommended to have surface treatment preventative maintenance performed. The lower the PCI, the less effective a preventative maintenance activity is in preserving the life of the roadways. Each type of preventative maintenance serves its own function, and project selection depends on the type and severity of distresses observed on the surface of the road. Streets that fall into the lower range of the adequate category, with PCI in low the 70s, may be prompted to perform a Texas Underseal or mill and overlay in order to extend the life of the road. It is recommended to evaluate the road condition prior to project selection to determine the appropriate type of construction for the roadways. Pavement preservation is recommended to be conducted on roadways that fall into the marginal category. Some of the pavement preservation methods are partial and full depth mill and overlay. Roadways that fall into the lower range of the marginal category, with PCI in the 40s, may be monitored without performing any maintenance activities since they have degraded to the point that pavement preservation methods are no longer effective and the roadways still have another few years' time before a reconstruction is needed. Prior to any mill and overlay or full depth bituminous removal and replacement, coring is strongly recommended to determine if the bituminous layer thickness is sufficient and underlying pavement is in good condition. If there are issues in the base and subgrade layers, pavement preservation methods are not recommended and those roadways would fall into the problem category that a reclamation or reconstruction needs to be done.