This data flow is received from another highway roadside device (e.g., another ramp meter controller) and contains control information for a highway roadside indicator. It can contain the actual data from which instructions to the driver and traveler can be produced by indicators at the roadside on highways in the geographic and/or jurisdictional area(s) served by the function. It is used for sharing of control between devices functioning in a hierarchical arrangement. It consists of the following data items each of which is defined in its own DDE:

+ indicator_ramp_control_data

Sub Data Flows

Parent Data Flows

Associated PSpecs