Connected Vehicle Roadside Equipment --> Personal Information Device:
intersection status

Definition
Included In
Communication Solutions
Characteristics
Security

Definitions

intersection status (Information Flow): Current signal phase and timing information for all lanes at a signalized intersection. This flow identifies active lanes and lanes that are being stopped and specifies the length of time that the current state will persist for each lane. It also identifies signal priority and preemption status and pedestrian crossing status information where applicable.

Connected Vehicle Roadside Equipment (Source Physical Object): 'Connected Vehicle Roadside Equipment' (CV RSE) represents the Connected Vehicle roadside devices that are used to send messages to, and receive messages from, nearby vehicles using Dedicated Short Range Communications (DSRC) or other alternative wireless communications technologies. Communications with adjacent field equipment and back office centers that monitor and control the RSE are also supported. This device operates from a fixed position and may be permanently deployed or a portable device that is located temporarily in the vicinity of a traffic incident, road construction, or a special event. It includes a processor, data storage, and communications capabilities that support secure communications with passing vehicles, other field equipment, and centers.

Personal Information Device (Destination Physical Object): The 'Personal Information Device' provides the capability for travelers to receive formatted traveler information wherever they are. Capabilities include traveler information, trip planning, and route guidance. Frequently a smart phone, the Personal Information Device provides travelers with the capability to receive route planning and other personally focused transportation services from the infrastructure in the field, at home, at work, or while en-route. Personal Information Devices may operate independently or may be linked with vehicle on-board equipment. This subsystem also supports safety related services with the capability to broadcast safety messages and initiate a distress signal or request for help.

Included In

This Triple is in the following Service Packages:

VS12: Vulnerable Road User Safety

This triple is associated with the following Functional Objects:

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

This Triple has the following triple relationships:

Relationship	Source	Destination	Flow
Depends On	ITS Roadway Equipment	Connected Vehicle Roadside Equipment	intersection control status

Communication Solutions

EU: Signal Control Messages - BTP/GeoNetworking/G5 (12)
US: SAE Signal Control Messages - LTE-V2X WSMP (18)
US: SAE Signal Control Messages - WAVE WSMP (20)

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

Selected Solution

US: SAE Signal Control Messages - WAVE WSMP

Solution Description

This solution is used within the U.S.. It combines standards associated with US: SAE Signal Control Messages with those for V-X: WAVE WSMP. The US: SAE Signal Control Messages standards include upper-layer standards required to implement signal control information flows. The V-X: WAVE WSMP standards include lower-layer standards that support connectionless, near constant, ultra-low latency vehicle-to-any communications within ~300m using the WAVE Short Messaging Protocol (WSMP) over IEEE WAVE in the 5.9GHz spectrum. The broadcast mode is interoperable with M5 FNTP.

ITS Application Entity SAE J2735 CEN ISO 19091 SAE J2945/B CTI 4501			Click gap icons for more info.
Mgmt Addressed Elsewhere	Facilities SAE J2735 SAE J2945	Security Bundle: IEEE 1609.2
	TransNet IEEE 1609.3
	Access Bundle: WAVE - Subnet

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	Now
Spatial Context	Adjacent
Acknowledgement	False
Cardinality	Broadcast
Initiator	Source
Authenticable	True
Encrypt	False

Interoperability	Description
National	This triple should be implemented consistently within the geopolitical region through which movement is essentially free (e.g., the United States, the European Union).

Security

Information Flow Security
	Confidentiality	Integrity	Availability
Rating	Not Applicable	Moderate	Moderate
Basis	This data is intended for all vehicles in the immediate area of the sender.	info needs to be accurate and should not be tampered so the vehicle OBE has correct SPaT info for all lanes; however the driver can still see the traffic signals. From NYC: This information will be used by the vehicle ASD to determine whether or not to issue a red light violation warning to the driver. False information could lead to the vehicle ASD not issuing a warning when in fact it should have. The vehicle operator is not using this information to decide whether or not to travel through the intersection. They will still have visual cues, such as traffic lights, indicating whether or not they can travel through the intersection.	needs to be available so the vehicle OBE has correct SPaT info; identifies signal priority and preemption status and pedestrian crossing status information, etc. However availability cannot be guaranteed over a wireless medium. From NYC: Without this information, vehicle ASD may not properly issue a red light violation warning to the driver. The vehicle operator will still use the traffic

Security Characteristics	Value
Authenticable	True
Encrypt	False

Connected Vehicle Roadside Equipment --> Personal Information Device:intersection status