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intersection blockage notification (Architecture Flow*)

Notification that a highway-rail intersection is obstructed and supporting information.

Roadway Traffic Management

This Architecture Flow is in the following Service Packages:

• Advanced Railroad Grade Crossing

This Architecture Flow is in the following Equipment Packages:

• Advanced Rail Crossing
• HRI Traffic Management

Data Flows*:

• intersection_blocked
• hri_blockage

Security Considerations:

• Operational Information - Safety

Standard* Activities:

• This architecture flow is a candidate for future standardization.

Roadway Wayside Equipment

This Architecture Flow is in the following Service Packages:

• Advanced Railroad Grade Crossing

This Architecture Flow is in the following Equipment Packages:

• Advanced Rail Crossing

Data Flows*:

• twe-stop_train_indication
• twe-stop_highway_indication

Security Considerations:

• Operational Information - Safety

Standard* Activities:

• IEEE 1570-2002: Standard for the Interface Between the Rail Subsystem and the Highway Subsystem at a Highway Rail Intersection