ITS Roadway Equipment --> Traffic Management Center:
traffic metering status

Definition
Included In
Communication Solutions
Characteristics
Security

Definitions

traffic metering status (Information Flow): Current operational status and operating parameters for ramp meters, interchange meters, mainline meters and other control equipment associated with roadway metering operations.

ITS Roadway Equipment (Source Physical Object): 'ITS Roadway Equipment' represents the ITS equipment that is distributed on and along the roadway that monitors and controls traffic and monitors and manages the roadway. This physical object includes traffic detectors, environmental sensors, traffic signals, highway advisory radios, dynamic message signs, CCTV cameras and video image processing systems, grade crossing warning systems, and ramp metering systems. Lane management systems and barrier systems that control access to transportation infrastructure such as roadways, bridges and tunnels are also included. This object also provides environmental monitoring including sensors that measure road conditions, surface weather, and vehicle emissions. Work zone systems including work zone surveillance, traffic control, driver warning, and work crew safety systems are also included.

Traffic Management Center (Destination Physical Object): The 'Traffic Management Center' monitors and controls traffic and the road network. It represents centers that manage a broad range of transportation facilities including freeway systems, rural and suburban highway systems, and urban and suburban traffic control systems. It communicates with ITS Roadway Equipment and Connected Vehicle Roadside Equipment (RSE) to monitor and manage traffic flow and monitor the condition of the roadway, surrounding environmental conditions, and field equipment status. It manages traffic and transportation resources to support allied agencies in responding to, and recovering from, incidents ranging from minor traffic incidents through major disasters.

Included In

This Triple is in the following Service Packages:

This Triple is described by the following Functional View Functional Objects:

This Triple is described by the following Functional View Data Flows:

This Triple has the following triple relationships:

None

Communication Solutions

Solutions are sorted in ascending Gap Severity order. The Gap Severity is the parenthetical number at the end of the solution.

Selected Solution

US: NTCIP Ramp Meters - SNMPv3/TLS

Solution Description

This solution is used within the U.S.. It combines standards associated with US: NTCIP Ramp Meters with those for I-F: SNMPv3/TLS. The US: NTCIP Ramp Meters standards include upper-layer standards required to implement center-to-field ramp meter communications. The I-F: SNMPv3/TLS standards include lower-layer standards that support secure center-to-field and field-to-field communications using simple network management protocol (SNMPv3); implementations are strongly encouraged to use the TLS for SNMP security option for this solution to ensure adequate security.

ITS Application Entity NTCIP 1207			Click gap icons for more info.
Mgmt NTCIP 1201 Bundle: SNMPv3 MIB	Facilities NTCIP 1207 ISO 15784-2	Security IETF RFC 6353
	TransNet IP Alternatives Internet Transport Alternatives
	Access Field SubNet Alternatives

Note that some layers might have alternatives, in which case all of the gap icons associated with every alternative may be shown on the diagram, but the solution severity calculations (and resulting ordering of solutions) includes only the issues associated with the default (i.e., best, least severe) alternative.

Characteristics

Characteristic	Value
Time Context	Recent
Spatial Context	Local
Acknowledgement	False
Cardinality	Unicast
Initiator	Destination
Authenticable	True
Encrypt	True

Interoperability	Description
Local	In cases where an interface is normally encapsulated by a single stakeholder, interoperability is still desirable, but the motive is vendor independence and the efficiencies and choices that an open standards-based interface provides.

Security

Information Flow Security
	Confidentiality	Integrity	Availability
Rating	Moderate	Moderate	Moderate
Basis	Device status information should be concealed, as an unauthorized observer could use this to reverse engineer device control systems.	Device status information needs to be available and correct, or the controlling system may take inappropriate maintenance action, costing time and money.	Device status information needs to be available and correct, or the controlling system may take inappropriate maintenance action, costing time and money.

Security Characteristics	Value
Authenticable	True
Encrypt	True

ITS Roadway Equipment --> Traffic Management Center:traffic metering status