[4][5] Since June 2012, a pilot implementation of the SURTRAC system[6] has been deployed on nine intersections in the East Liberty neighborhood of Pittsburgh, Pennsylvania.
The decentralized control of individual intersections enables greater responsiveness to local real-time traffic conditions.
Decentralization facilitates scalability by allowing the incremental addition of controlled intersections over time with little change to the existing adaptive network.
The combination of competing for dominant flows and densely spaced intersections presents a challenge for all adaptive traffic control systems.
However, it is noted that the resolution of the cameras utilized in the SURTRAC system is reportedly not high enough to enable the detection of license plates or the recognition of individual faces.
Additionally, concerns have been raised that these systems might inherently favor motorized traffic, potentially leading to disadvantages for pedestrians, bicyclists, and public transit users, and could inadvertently encourage increased use of automobiles.