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原文传递 Analysis of Effects of Tire Tread Deterioration on Safety Impacts from Analysis of Inspection Data.

题名：	Analysis of Effects of Tire Tread Deterioration on Safety Impacts from Analysis of Inspection Data.
作者：	Matthews, H. S.
关键词：	Data analysis, Highway safety, Safety and Human Factors, Pennsylvania (State), Deterioration, Inspection, Thickness, Tire treads, Vehicle safety, Highways, Vehicles and equipment, Carnegie Mellon University
摘要：	In this project, the research team leverages more than 10 years worth of data from millions of passenger vehicle safety inspections in Pennsylvania to track the deterioration of tire tread thickness. Ensuring that tire tread thickness is greater than 2/32 of an inch for all tires on the vehicle is an explicit criteria mandated by state law during annual safety inspections. When tire tread depth data is tracked over time for an individual vehicle, one can see how tread of tires decreases, and can also make estimates and extrapolations of deterioration relevant to the whole fleet. In this project, the team will organize the available data to the vehicle level and attempt to create time series of tire wear for each vehicle over all available records. The team will then develop "deterioration curves" for the tire tread values based on the annually updated values. The team will then aggregate the vehicle-level deterioration rates to create fleet average deterioration rates for tire tread, and compare these values with those presented in the literature. Using these deterioration rates, the team will produce vehicle-level estimates that predict when a car's tread would fall below the specified safety threshold, because if not addressed by purchasing new tires, these cars would be unsafe to drive. More specifically, the team cares about predicting what percent of cars in a year would be expected to fall below the threshold at some point between the dates of the annual safety inspections.
报告类型：	科技报告