Security Monitoring (Subsystem*)

The Security Monitoring Subsystem (SMS) includes surveillance and sensor equipment used to provide enhanced security and safety for transportation facilities or infrastructure. The equipment represented by this subsystem is located in non-public areas of transportation facilities (e.g. maintenance and transit yards) or located on or near non-roadway parts of the transportation infrastructure (e.g. transit railway and guideways). This subsystem also includes surveillance and sensor equipment located on or near major roadway features such as bridges, tunnels, and interchanges, when the equipment’s primary function is one of security and safety. If the primary function of the equipment is traffic surveillance or incident detection, then the surveillance or sensors would be covered as part of the Roadway Subsystem. Similarly, the surveillance and sensor equipment for public areas of transportation facilities is covered in the Remote Traveler Support Subsystem. The surveillance equipment includes video (e.g. CCTV cameras) and/or audio systems. The sensor equipment includes threat sensors (e.g. chemical agent, toxic industrial chemical, biological, explosives, and radiological sensors), object detection (e.g. metal detectors), intrusion or motion detection, and infrastructure integrity monitoring (e.g. rail track continuity checking or bridge structural integrity monitoring). Limited processing of collected sensor and surveillance data is also included in this subsystem to support threat detection and classification.

Functionality
Inputs/Outputs
Security
Subsystem Interfaces Diagram
Terminator Interfaces Diagram

Subsystem Interfaces Diagram

This is a context diagram for the entity Security Monitoring Subsystem that shows the interfaces to subsystems and every architecture flow that this entity sends or receives, as defined in the National ITS Architecture. A complete list of all architecture flows shown on this diagram, is available under the Inputs/Outputs section on this page.

Get the Source Graphic, a Enhanced Windows Metafile (EMF), in ZIP format.

Terminator Interfaces Diagram

Get the Source Graphic, a Windows Metafile (WMF), in ZIP format.

Security Considerations:

The Security Monitoring Subsystem (SMS) includes surveillance and sensor equipment used to provide enhanced security and safety for transportation facilities or infrastructure. The SMS handles information used to support safe operation of the transportation system and to support emergency response. The threat sensor, object detection and infrastructure integrity monitoring equipment represented by this subsystem perform safety critical functions. Since improper operation of these systems can directly endanger motorists and communities, security services should be established so that these systems operate with very high levels of integrity and availability and system operation degrades in a fail-safe manner. The information associated with operation of these systems is confidential and typically will need special measures to protect it from disclosure. Although malicious tampering is possible, the more likely threats to SMS sensor and surveillance information involve inadvertent loss or corruption of the provided information. Again, availability and integrity are the paramount security objectives. The surveillance and sensor data is not meant for public disclosure so confidentially is important. Limited processing of collected sensor and surveillance data is also included in this subsystem to support threat detection and classification. Physical security around the SMS sensors and surveillance equipment may be necessary to protect the equipment from usurpation and disruption.

Functionality: Equipment Packages* and PSpecs*

Field Secure Area Sensor Monitoring (Equipment Package*)
PSpecs:
- 5.1.7.2.3-Collect Secure Area Sensor Data
- 5.1.7.2.4-Process Secure Area Sensor Data
Field Secure Area Surveillance (Equipment Package*)
PSpecs:
- 5.1.7.2.1-Surveil Secure Area
- 5.1.7.2.2-Process Secure Area Surveillance

Inputs/Outputs: Architecture Flows* and Data Flows*

Emergency Management Security Monitoring

infrastructure monitoring sensor control (Architecture Flow*) - Data used to configure and control infrastructure monitoring sensors.
Data Flows*:
- infrastructure_integrity_sensor_control
secure area sensor control (Architecture Flow*) - Information used to configure and control threat sensors (e.g., thermal, acoustic, radiological, chemical), object, motion and intrusion detection sensors. The provided information controls sensor data collection, aggregation, filtering, and other local processing.
Data Flows*:
secure area surveillance control (Architecture Flow*) - Information used to configure and control audio and video surveillance systems used for transportation infrastructure security in secure areas. The provided information controls surveillance data collection, aggregation, filtering, and other local processing.
Data Flows*:
- secure_area_surveillance_control
- secure_area_surveillance_field_proc_parameters

Secure Area Environment Security Monitoring

secure area characteristics (Architecture Flow*) - The range of physical and environmental characteristics (visual, audible, presence, motion, chemical, biological, radiological, other) that are monitored by surveillance and sensor systems.
Data Flows*:

Security Monitoring Emergency Management

infrastructure monitoring sensor data (Architecture Flow*) - Data read from infrastructure-based sensors that monitor the condition or integrity of transportation infrastructure including bridges, tunnels, interchanges, pavement, culverts, signs, transit rail or guideway, and other roadway infrastructure. Includes sensor data and the operational status of the sensors.
Data Flows*:
- field_processed_infrastructure_integrity_sensor_data
- infrastructure_integrity_sensor_status
secure area sensor data (Architecture Flow*) - Data provided by threat sensors (e.g., thermal, acoustic, radiological, chemical), and intrusion, motion, and object detection sensors in secure areas indicating the sensor's operational status, raw and processed sensor data, and alarm indicators when a threat has been detected.
Data Flows*:
secure area surveillance data (Architecture Flow*) - Data collected from surveillance systems used to monitor secure areas. Includes video, audio, processed surveillance data, equipment operational status, and alarm indicators when a threat has been detected.
Data Flows*: