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

  • Study reveals benefits of electric Beijing taxi fleet
    August 6, 2013
    The impact of introducing plug-in electric vehicles to the streets of Beijing, one of the world’s most polluted cities, has been examined by researchers from the University of Michigan in the ACS journal Environmental Science and Technology. They use big data mining techniques to understand the impact of fleet electrification. As part of the study, the researchers highlight that while plug-in electric vehicles have developed rapidly in recent years there are still uncertainties with regard to market accepta
    Read More
  • Avoiding the call of the wild
    June 29, 2018
    Hitting an animal on a rural road can be fatal for all parties involved – but detecting and avoiding them requires clever technology. Andrew Williams carefully scans the horizon for details. Wildlife-vehicle collisions are an ever-present threat in rural areas around the world, and there is certainly nothing funny about suddenly finding an angry moose in your headlights on a sharp bend. A variety of detection and avoidance systems are currently in use or under development to help prevent your vehicle being
    Read More
  • Advancing traffic management for smart cities
    September 3, 2024
    Promises of increased safety, less pollution, increased productivity and a better quality of life in smart cities are just too good to be ignored. Dany Longval of Teledyne Flir talks through some of the challenges
    Read More
  • Connected vehicle trials get big backing from USDOT
    March 14, 2016
    Connected vehicle technology will emerge as a sustainable reality at three sites in the US over the next four years. Jon Masters reports. Advocates of connected vehicle (CV) technology have received a welcome boost from news that the US government has committed a further $4 billion towards automated vehicle research and CV technology. This comes hot on the heels of the US Department of Transportation’s $42 million CV pilot pledge in October last year.
    Read More

Highlighted Content