Bluetooth-based traffic detection

Traffax has launched BluFax, based on the globally ubiquitous Bluetooth digital communications protocol, which operates by detecting the MAC addresses of Bluetooth signals from passing cars.
February 6, 2012 Read time: 2 mins
A BluFax freeway installation in Indiana
2262 Traffax has launched BluFax, based on the globally ubiquitous 1835 Bluetooth digital communications protocol, which operates by detecting the MAC addresses of Bluetooth signals from passing cars. By positioning two units at distances of between 1-3km, vehicle travel times are calculated from the relative detection times recorded by the two units. Traffax has licensed the patent-pending technology from the University of the Maryland, where the concept originated under the support of the Maryland State Highway Administration.

Traffax says Bluetooth address matching can be used for a number of applications including measurement of travel times on both freeway and arterial roadways, measurement of origin-destination patterns, and tracking of pedestrian flows. Since it directly measures travel times and space-mean speeds, Traffax claims BluFax is one of the few technologies that offers the ability to accurately measure arterial travel times. The company says that demonstrated detection rates exceeding five per cent of the total traffic stream, yield sample sizes adequate for reliable measurement of arterial flows.

There are two versions of the Traffax BluFax unit. An off-line version is offered that stores its measurements on removable storage media for subsequent processing. This device is typically used for traffic studies, performance measurement and validation of other data collection techniques. It is self-powered and requires no communications.

A real-time version is also offered that continuously transmits the MAC addresses and detection times of passing vehicles to a collection site for continuous processing. The real-time unit is used for such applications as display of travel times on variable message signs, and data inputs to 511 telephone systems.
Detection, Monitoring & Machine Vision

For more information on companies in this article

Related Content

  • Mileage based charging offers secure future for funding
    August 10, 2016
    HNTB’s Matthew Click sets out why a move to mileage-based pricing is inevitable. Infrastructure is the most neglected yet the most critical engine of our society, and our continued indifference could lead to a dystopian future. Our roads, bridges and highways have been largely passed by in the digital age—marginalised in an era when funding is limited and stewardship of physical assets has given way to our preoccupation with technological innovation and data—the stuff of the virtual realm.
    Read More
  • New approach to data handling aids development of smarter cities
    January 14, 2013
    David Crawford has been to the Irish capital to see a potent memorandum of understanding at work. An imaginative collaboration between the world’s largest IT company and one of Europe’s smaller capital cities is demonstrating a new approach to data handling that could have far reaching implications for urban public transport worldwide. A close working relationship between IBM and Dublin City Council (DCC) dates from 2010.
    Read More
  • Strike action prompts commuters to try something different
    June 2, 2014
    David Crawford highlights responses to transit disruption on both sides of the Atlantic. Shortly before workers at San Francisco Bay Area Rapid Transit (BART) began a lengthy round of pay and conditions-related strikes in summer 2013, impacting on the daily lives of 400,000 communities, online ridesharing group Avego publicised a new web address: bartstrike.com. By the start of the following week, Avego was encouraging stranded commuters to download its smartphone app by offering them the chance in a raffle
    Read More
  • New approach to data handling aids development of smarter cities
    January 11, 2013
    David Crawford has been to the Irish capital to see a potent memorandum of understanding at work. An imaginative collaboration between the world’s largest IT company and one of Europe’s smaller capital cities is demonstrating a new approach to data handling that could have far reaching implications for urban public transport worldwide. A close working relationship between IBM and Dublin City Council (DCC) dates from 2010. The IT giant was looking for a local transport authority as partner for testing IBM’s
    Read More

Highlighted Content