ITS Roadway Equipment --> Multi-Access Edge Computing:
roadway dynamic signage status

This flow may also be implemented by ITS Roadway Equipment --> Connected Vehicle Roadside Equipment: roadway dynamic signage status

Definition
Included In
Communication Solutions
Characteristics
Security

Definitions

roadway dynamic signage status (Information Flow): Current operating status of dynamic message signs.

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.

Multi-Access Edge Computing (Destination Physical Object): 'Multi-Access Edge Computing' ((MEC) previously known as mobile edge computing) represents computing devices that operate and are managed like a cloud server, but are deployed at the edge of a network (typically a cellular network, but it could be any network). While not in strict proximity to the transportation network, these systems do benefit from vastly decreased distances to the roadway compared to central systems, and so can provide lower latency than strictly backoffice systems

Included In

This Triple is in the following Service Packages:

PT12: Transit Vehicle at Station/Stop Warnings

This triple is associated with the following Functional Objects:

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

None

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

Data for Distribution (TBD) - Eclipse Zenoh over Wireless

Solution Description

This solution is used within Canada and the U.S.. It combines standards associated with Data for Distribution (TBD) with those for Eclipse Zenoh over Wireless. The Data for Distribution (TBD) standards include a placeholder for upper-layer standards necessary to define the data (elements and structures) necessary to complete a solution for the information flow based on data distribution technologies. The data standard will need to include a specific customization for the desired data distribution technology used (e.g., Kafka, DDS, etc.).. The Eclipse Zenoh over Wireless standards include lower-layer standards that support data distribution of specific types of data over wireless links.

ITS Application Entity Development needed			Click gap icons for more info.
Mgmt Eclipse Zenoh	Facilities Eclipse Zenoh	Security IETF RFC 8446
	TransNet IP Alternatives IETF RFC 9293
	Access Wireless Internet Alternatives (NA)

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	Adjacent
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 not be available, as those with criminal intent may use this information toward their own ends.	Data is intended to feed dissemination channels, either C-ITS messages or DMS or other channels, so it should generally be correct as it is distributed widely and any forgery or corrupted data will have widespread impact.	Occasional outages of this flow will delay dissemination of the data to travelers (the eventual end user) which could have significant impacts on travel, both safety and mobility impacts.

Security Characteristics	Value
Authenticable	True
Encrypt	True

ITS Roadway Equipment --> Multi-Access Edge Computing:roadway dynamic signage status