Congestion is a growing problem in many European cities. Local authorities are looking to new technologies for traffic management as one means of tackling this. Moreover, regulating the traffic flow may reduce vehicle emissions, and giving priority to buses may foster a modal shift to public transport. These benefits are expected to be greater through the integration of multiple systems, such as urban traffic control and driver information. However, there is limited evidence on the real-life performance of such systems on which to base investment decisions.