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

  • US braces itself for congestion pain
    February 6, 2020
    Mary Scott Nabers, author of Inside the Infrastructure Revolution: A Roadmap for Building America, looks at how different US states are embracing the need for public transport investment
    Read More
  • Cooperative infrastructure systems waiting for the go ahead
    February 3, 2012
    Despite much research and technological promise, progress towards cooperative infrastructure system deployment is still slow. Here, Robert Cone and John Miles take a considered look at how and when it might come about. From a systems engineering viewpoint it looks logical and inevitable that vehicles should be communicating between themselves and with the road infrastructure. But seen from a business viewpoint the case is not proven.
    Read More
  • A new beginning for travel information, based on users' needs
    February 3, 2012
    Despite its name, the EU's forthcoming SUNSET project could represent a new beginning for travel information services. Here, Susan Grant-Muller and Frances Hodgson from the Institute for Transport Studies at the University of Leeds detail a project which is intended to exert a greater influence on network users' travel habits
    Read More
  • Greenowl brings bespoke traveller information one step closer
    June 4, 2015
    Greenowl’s voice-only congestion warning smartphone app alerts drivers to problems ahead and could be the way ahead for traffic information. If there is one point Matt Man, CEO of Canadian company Greenowl, wants to make clear from the start, it is that his company’s app is not a navigation system. He says: “Our system does not direct drivers to their destination because we mainly focus on commuters who know how to get to where they are going and only need information about any delays and incidents ahead of
    Read More

Highlighted Content