This data flow is used within the Manage Traffic function and contains the portion of a strategy that gives preemption to emergency vehicles that relates to roads (surface streets) and highways that are outside the area served by the local TMC. This data will be sent to the appropriate other TMCs so that they can implement the requested preemption measures to give the emergency vehicles preemption throughout their route. The data flow consists of the following data items each of which is defined in its own DDE:

+ selected_emergency_vehicle_strategy

Sub Data Flows

Parent Data Flows

Associated PSpecs