Under general man­age­ment by the state of Hessen, nine German states and Austria have decided to implement a traffic network control system on three north-south motorway corridors throughout the federal territory. The network control strategies were developed in close cooperation among the states. This will hereby make the coordinated and inter-regional rerouting of traffic possible in the case of a traffic incident. In addition, an internet-based application was developed which supports coordinated strategy man­age­ment among various traffic control centers within the scope of the network control system. Pilot phases for testing the "coordinated application of traffic man­age­ment strategies" were initiated in 2006/2007. AS+P fundamentally supported the authorities in defining detours, strategies and criteria triggering incidents. The focal point of AS+P's work was, however, the evaluation of the pilot phase. This encompassed, on the one hand, determining a quantitative use of the network control strategies according to EWS recommendations which were based on economic efficiency studies of roads. On the other hand, AS+P collected and assessed the operational/organizational aspects based on interviews and questionnaires. The results of the evaluation lead to proposals for the technical and organizational optimization of the coordinated network control.