1.6.1.2.3: Provide SSR Device Controls

This process is responsible for initiating the activation of HRI Standard Speed Rail control devices at active vehicular and pedestrian grade crossings. This process responds to requests sent by the Control HRI Traffic Signals process based on detection of an oncoming train. This process sends command information to the Manage Device Control containing control signals and commands that are unique to the SSR functions. State information is also sent to the Maintain Device State process to monitor the last known state of the controls commands being processed.

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

This process is associated with the following functional objects:

• Roadway Standard Rail Crossing
• Roadway Transit Signal Control

This process is associated with the following data flows:

• ssr_control_request
• ssr_device_control
• ssr_device_control_state