ANALYSIS OF THE IMPACTS OF FREEWAY WORK ZONES AND INCIDENTS USING BLUETOOTH DATA

摘要

ITS can provide a cost-effective tool for postmortem analysis of road construction projects and incidents on freeway corridors. The impacts of construction and incidents are evaluated in terms of delays and queue lengths determined from travel time and speed data obtained from Bluetooth readers deployed along an approximately 100 mile section of Interstate 35 in Texas. The method can accurately determine travel times and delays and provide interval estimate for queue lengths. Travel times are calculated by aggregating a sequence of Bluetooth segments taking into account the dynamically changing travel time lags of the different segments. The method can be implemented by following the steps and the segment aggregation logic described in the paper. The use of the method is illustrated by two case studies, a night-time work zone and a major accident on I-35 in Texas in 2013.