Skip to main content

Atlanta deploys Bluetooth-based DMS to help improve travel times

The Cobb County Department of Transportation (CCDOT) in Georgia, USA, has activated six full-colour dynamic message signs (DMS) in the metropolitan Atlanta area in a bid to improve travel times and enable motorists to choose less-congested routes. The LED signs have been installed on Cobb Parkway, South Marietta Parkway, Roswell Road and Spring Road to provide travel time information for common destinations and indicate the congestion level related to specific routes in real time. Travel times on I-75 and C
May 10, 2017 Read time: 2 mins
The Cobb County Department of Transportation (CCDOT) in Georgia, USA, has activated six full-colour dynamic message signs (DMS) in the metropolitan Atlanta area in a bid to improve travel times and enable motorists to choose less-congested routes.


The LED signs have been installed on Cobb Parkway, South Marietta Parkway, Roswell Road and Spring Road to provide travel time information for common destinations and indicate the congestion level related to specific routes in real time.

Travel times on I-75 and Cobb Parkway appear in digits that are green, yellow or red, depending on the average speed of the roadway. Green digits indicate near free-flow speeds, yellow digits indicate moderate speeds and red digits indicate slow conditions. Public service announcements as well as information related to incidents, construction and special events also will appear on the signs.

The travel time messages use real-time data collected by a recently expanded travel time system, which now covers many major arterials within Cobb County and freeways in the Atlanta metro area. The data comes from detectors that collect anonymous electronic addresses from motorists’ 1835 Bluetooth and wi-fi-enabled mobile devices.

For more information on companies in this article

Related Content

  • GPS-based virtual detection zones improve bus travel times
    July 5, 2013
    San Antonio, Texas’ new Via Primo will be kept on schedule with minimal impact on individual traffic flow with the implementation of a GPS-based bus rapid transit system that allows the bus to automatically request a green light when it is behind schedule and approaching a busy intersection.
  • IBM and NXP partner on Dutch connected car pilot
    February 21, 2013
    The first results of a smarter traffic pilot, conducted in the Dutch city of Eindhoven by IBM and NXP Semiconductors demonstrate how the connected car automatically shares braking, acceleration and location data that can be analysed by the central traffic authority to identify and resolve road network issues, say the companies. “The trial successfully showed that anonymous information from vehicles can be analysed by local traffic authorities to resolve road network issues faster, reduce congestion and impr
  • Receiving real time passenger information in Finland
    February 3, 2012
    David Crawford sees lively prospects for Finnish innovation
  • Tattile explores freedom of movement
    October 5, 2020
    Dense urban centres are complex enforcement environments – but camera-based traffic systems enable all aspects of monitoring, explains Massimiliano Cominelli of Tattile