Travel time information is a very valuable statistic in transportation systems. Itsupports a wide body of decision makers ranging from passengers trying to minimize trip timesto authorities who rely on this data for monitoring and planning purposes and emergencyresponse. Therefore, collecting accurate travel time information is a very pivotal task. In recentyears, the I-95 Corridor Coalition has been providing extensive real-time travel information forseveral freeway segments and arterials surrounding Interstate 95 under its Vehicle Probe Project.As a partner to this collaborative effort, the University of Maryland has been responsible for datavalidation and verification. This process involves comparing the reported speeds to theobservations recorded by Bluetooth sensors in order to evaluate the accuracy of the reporteddata. In this paper, we first discuss the comparison method specified in the Projectdocumentation and then explore some alternative approaches.
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