ramp_signal_state

This data flow is used within the Manage Traffic function to indicate the required state of the ramp meter controllers at the entrance to the highway ramps controlled by the TMC. The data flow consists of the following data items each of which is defined in its own DDE:

ramp_list
+ 1{ramp_controls}list_size

Sub Data Flows

• list_size
• ramp_controls
• ramp_list

Parent Data Flows

• coordination_data_ramps_to_roads
• historical_traffic_flow_state
• traffic_flow_state

Associated PSpecs/Terminators

• 1.2.3 - Determine Ramp State
• 1.2.4.2 - Output Control Data for Freeways