This data flow is from a transportation information center to a vehicle and contains the actual state of operation of the roadside and grade crossing indicators used to pass instructions to drivers and travelers on roads (surface streets). It is used to provide phase (red, amber, green, left-turn, etc.) information and consists of the following data items each of which is defined in its own DDE:

+ list_size{indicator_identity
+ roadside_signal_phase_indication}

Sub Data Flows

Parent Data Flows

Associated PSpecs/Terminators

Parent Information Flows