This data flow is sent to the Manage Transit function to provide notification of a major emergency such as a natural or man-made disaster, civil emergency, or child abduction to be sent to transit system operators to be on the look out for certain conditions. It consists of the following data items each of which is defined in its own DDE:

list_size + list_size{alert_type
+ alert_severity
+ geographical_area
+ alert_duration}

Sub Data Flows

Parent Data Flows

Associated PSpecs