1.6.1.4.4: Report HRI Status on Approach

This process is responsible for providing real-time HRI status to vehicles as they approach an HRI. It must discriminate between vehicles near, but not approaching, the HRI (e.g. on parallel side streets, etc.). This process develops the message to be broadcast to nearby vehicles by receiving time_to_closing data and the hazard_condition signal and calculating the appropriate window of time to display the message. The message is built from the approach_warning data received from the Report Alerts and Advisories process.

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

This process is associated with the following functional objects:

• Roadway Advanced Rail Crossing
• Roadway Standard Rail Crossing

This process is associated with the following data flows:

• approach_warning
• hazard_condition
• hri_guidance_for_roadway_info
• time_to_closing
• hri_data_for_signage_from_roadway
• train_arrival_data_for_signage_from_roadway