Keeping traffic flowing through Seattle’s Central Business District

The advantages of Siemens CONCERT made it the logical choice for SDOT.

Next-generation ATMS meets growing demand

Seattle is the fastest growing large city in the United States, a position it has held four times in the last eight years.

Realizing trends like this would continue to impact an already taxed road and highway system, the Seattle Department of Transportation (SDOT) worked with DKS Associates to find a powerful solution that could adapt over time. After evaluating a variety of options, the team turned to Siemens CONCERT Advanced Traffic Management System (ATMS).


CONCERT is a feature-rich ATMS that generates information for everyone who needs to know it, from the staff at SDOT’s Transportation Operations Center (TOC) to drivers, bicyclists, and pedestrians. It integrates data from all of SDOT’s information sources, including the Washington State Department of Transportation (WSDOT) and Acyclica. It also uses logic that is easy to understand and develop to trigger fully or partially automated responses.

More dynamic traffic management

CONCERT incorporates demand information in addition to time of day in order to increase the responsiveness needed for rapid, real-time handling of congestion throughout the central business district (CBD). It uses more data than just the last few minutes of traffic information and uses it more intelligently. For example, it looks for patterns over time to determine which traffic plan to select during rapidly changing conditions on the street. CONCERT also enables SDOT staff to easily write algorithms that smooth transitions from one plan to the next.

One overarching platform

CONCERT facilitates dynamic traffic management because it allows the TOC staff to manage all incoming information and outbound commands from one interface. It provides data visualization as well as the ability to monitor all of SDOT’s disparate traffic information systems from one overarching platform and workstation.


A cost-effective solution, CONCERT uses existing controllers and cabinets. It also requires fewer detectors to monitor an entire quadrant, which was important because Seattle’s CBD has 260 intersections. SDOT was able to complete a major upgrade in the CBD by deploying only 20 new detectors. The Mercer Corridor, the main thoroughfare through the CBD, has seen a marked improvement in travel times.


CONCERT is also designed to be flexible so that it easily adapts to future needs, something it has proven successfully since it was launched in 2016. In short, CONCERT synchronizes all traffic and traffic-related systems to work together to fulfill Seattle’s traffic and mobility strategy today and tomorrow.