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Bluetooth traffic detectors for use as permanently installed travel time instruments.

In support of the Maryland State Highway Administration (SHA) business objectives related to mobility and congestion relief, in 2009 the University of Maryland’s (UMD) Center for Advanced Transportation Technology (CATT) proposed to develop the use of Bluetooth TM traffic monitoring (BTM) technology as permanently installed sensors on the Maryland highway network. These sensors would be used to directly measure travel time at a high level of accuracy continuously – 24 hours per day, 7 days a week, 365 days per year (24/7/365). The initial development of BTM technology at UMD from 2007-2009 targeted portable, easily deployable sensors. In 2008 a prototype system of 25 sensors was produced and remains in use with the SHA Highway Information Services Division (HISD) to this day. This project extends the availability of high resolution BTM data for real-time operations applications.