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1.6.1.1–Detect Roadway Events (Pspec*)

This process is responsible for monitoring local sensor data obtained from traffic surveillance and then determining and reporting the current state of all traffic in the HRI vicinity. The process provides triggers for other processes within Manage HRI Traffic Volume. It also monitors the device controls as they are initiated by the Activate HRI Device Controls process.

This Pspec is associated with the Roadway Subsystem*.

This Pspec is associated with the following Equipment Packages*:

• Advanced Rail Crossing

Data Flows*:

• approaching_train_data--In
• current_hri_state--Out
• device_control_state--In
• event_notice--Out
• hri_device_sense--In
• hri_status--In
• hri_traffic_surveillance--In
• indicator_sign_control_data_for_hri--In
• roadway_status--Out
• train_sense_data--Out

ENCLOSING DFD

User Service Requirements*:

• 1.10.0
• 1.10.1
• 1.10.1.7
• 1.10.2
• 1.10.2.1
• 1.10.2.1.1
• 1.10.3
• 1.10.3.3
• 1.10.3.3.3
• 1.3.0
• 1.3.1
• 1.3.1.2
• 1.3.1.2.1
• 1.3.1.2.1(d)
• 1.3.1.2.1(d).1