This data flow provides sensor data, acquired by HRI at grade crossings, that is relevant to the overall traffic surveillance functions of ITS (e.g. grade crossing rail traffic). It contains HRI closure data, status data, and other HRI information. This data flow consists of the following items each of which are defined in its own DDE:

+ closure_event_data
+ intersection_blocked
+ rail_schedules_data

Sub Data Flows

Parent Data Flows

Associated PSpecs