1.2.7.12: Control Roadway Warning System

This process shall detect potential roadway hazards (e.g., roadway weather conditions, road surface conditions, traffic congestion and queues, obstacles in the roadway, wrong way drivers detected) and provide warnings to drivers, bicyclists, and pedestrians. This process shall accept configuration and control parameters from another process for monitoring these conditions, assessing the potential hazard, and autonomously activating warning lights. The process may send warnings to other roadside processes for display to a driver via a dynamic message sign (DMS) or in-vehicle signage. The process shall accept inputs to control the roadway warning system devices and return operational status (state of the device, configuration, and fault data) to the controlling process. For stop signs where a minor road intersects with a major road this process shall provide warnings to drivers if the gap is not sufficient to cross into the major traffic stream.

This process is associated with the ITS Roadway Equipment physical object.

This process is associated with the following functional objects:

• Roadway Mixed Use Crossing Safety
• Roadway Restriction Monitoring and Warning
• Roadway Warning
• Roadway Wrong Way Vehicle Detection

This process is associated with the following data flows:

• dms_roadway_warning_from_roadway
• infrastructure_warning_device_status
• infrastructure_warning_system_control
• infrastructure_warning_system_status
• intersection_collision_data_for_warning
• local_env_data_for_warning
• local_sensor_data_for_warning
• road_user_dynamic_warning
• roadway_warning_device_status
• roadway_warning_equip_status_for_m_and_c
• roadway_warning_system_control
• roadway_warning_system_status
• signage_roadway_warning_from_roadway
• signage_stop_sign_warning_from_roadway
• stop_sign_gap_device_status
• stop_sign_gap_system_control
• stop_sign_gap_system_status
• stop_sign_intersection_traffic
• t_other_rw_roadway_warning_from_roadway
• td-intersection_safety_data
• td-roadway_warning
• td-stop_sign_gap_warning
• vehicle_traffic_data_from_roadside