This data flow is sent from the Manage Emergency Services function to the Manage Traffic function to request activation of a barrier system to support emergency response. These barrier systems include gates, barriers, and other automated or remotely controlled systems used to manage entry to roadways. It consists of the following data items each of which is defined in its own DDE:

list_size + list_size{station_id
+ device_identity
+ barrier_system_control_request}

Sub Data Flows

Parent Data Flows

Associated PSpecs

Parent Information Flows