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.

Air Quality & Weather Systems Networking & Communication Systems

For more information on companies in this article

Related Content

  • Developments in signal head lens technology
    February 3, 2012
    Heads and tails Leading manufacturers of traffic signal systems discuss developments in signal head technology as well as some of the legacy issues which affect future deployments Transparent model of Dambach's ACTROS.line technology, showing the bus electronics in the signal head Cowls could be superseded by the greater use of lens technology
    Read More
  • Need for secure approach to connected vehicle technology
    January 7, 2013
    Accidental or malicious issue of false messages to connected vehicles could result in dire consequences, so secure systems of authentication and certification are likely to be necessary, write Paul Avery and Sandra Dykes. Connectivity among vehicles in urban traffic systems will provide opportunity for beneficial impacts such as congestion reduction and greater safety. However, it also creates security risks with the potential for targeted disruption. Security algorithms, protocols and procedures must take
    Read More
  • The Asia-Pacific poses a multitude of ITS challenges
    May 30, 2014
    The Asia-Pacific ITS Forum and Exhibition in Auckland, New Zealand, provided a focus for the region’s ITS Associations. Mary Bell reports. In late April, ITS New Zealand hosted the 13th Asia-Pacific ITS Forum and Exhibition in Auckland. Around 350 delegates from 24 nations gathered to share and advance ITS applications on both strategic and technical levels and to discuss the differing and various challenges faced in the region.
    Read More
  • Machine vision makes progress in traffic applications
    June 2, 2014
    Machine Vision technology is easing the burden on hard-pressed control room staff and overloaded communications networks.
    Read More

Highlighted Content