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PT13: Vehicle Turning Right in Front of a Transit Vehicle

The Vehicle Turning Right in Front of a Transit Vehicle (VTRFTV) service package determines the movement of vehicles near to a transit vehicle stopped at a transit stop/station and provides an indication to the transit vehicle operator that a nearby vehicle is pulling in front of the transit vehicle to make a right turn. This service package will help the transit vehicle determine if the area in front of it will not be occupied as it begins to pull away from a transit stop/station.

Relevant Regions: Australia, Canada, European Union, and United States

Enterprise
Functional
Physical
Goals and Objectives
Needs and Requirements
Sources
Security
Standards
System Requirements

Enterprise

Development Stage Roles and Relationships
(hide)

Source	Destination	Role/Relationship
Basic Transit Vehicle Developer	Basic Transit Vehicle	Develops (hide) An Enterprise creates the target Resource or Document. The Enterprise that engineers a traffic signal controller (ITS Roadway Equipment), or designs a vehicle (Basic Vehicle) or authors a technical standard will have the Develops role.
Basic Transit Vehicle Developer	Transit Vehicle OBE Developer	Application Interface Specification (hide) The definition of an interface between two application components that operate on two distinct pieces of hardware. The Application Interface Specification is specific to the application in question.
Transit Vehicle OBE Developer	Basic Transit Vehicle Developer	Application Interface Specification (hide) The definition of an interface between two application components that operate on two distinct pieces of hardware. The Application Interface Specification is specific to the application in question.
Transit Vehicle OBE Developer	Transit Vehicle OBE	Develops (hide) An Enterprise creates the target Resource or Document. The Enterprise that engineers a traffic signal controller (ITS Roadway Equipment), or designs a vehicle (Basic Vehicle) or authors a technical standard will have the Develops role.
Transit Vehicle OBE Developer	Vehicle Developer	Application Interface Specification (hide) The definition of an interface between two application components that operate on two distinct pieces of hardware. The Application Interface Specification is specific to the application in question.
Vehicle Developer	Transit Vehicle OBE Developer	Application Interface Specification (hide) The definition of an interface between two application components that operate on two distinct pieces of hardware. The Application Interface Specification is specific to the application in question.
Vehicle Developer	Vehicle	Develops (hide) An Enterprise creates the target Resource or Document. The Enterprise that engineers a traffic signal controller (ITS Roadway Equipment), or designs a vehicle (Basic Vehicle) or authors a technical standard will have the Develops role.

Installation Stage Roles and Relationships
(hide)

Source	Destination	Role/Relationship
Basic Transit Vehicle Installer	Basic Transit Vehicle	Installs (hide) An Enterprise performs the initial delivery, integration and configuration of the target Resource. This might be a system integrator, a state DOT Enterprise performing its own installation, or a device supplier that performs on-site installation.
Basic Transit Vehicle Owner	Basic Transit Vehicle Installer	Installation Agreement (hide) An agreement whereupon one party installs a system on behalf of a second party.
Basic Transit Vehicle Owner	Basic Transit Vehicle Verifier	Verification Agreement (hide) An agreement for one party to verify that a system owned by the second party operates according to the system's design.
Transit Vehicle OBE Installer	Transit Vehicle OBE	Installs (hide) An Enterprise performs the initial delivery, integration and configuration of the target Resource. This might be a system integrator, a state DOT Enterprise performing its own installation, or a device supplier that performs on-site installation.
Transit Vehicle OBE Owner	Transit Vehicle OBE Installer	Installation Agreement (hide) An agreement whereupon one party installs a system on behalf of a second party.
Transit Vehicle OBE Owner	Transit Vehicle OBE Verifier	Verification Agreement (hide) An agreement for one party to verify that a system owned by the second party operates according to the system's design.
Vehicle Installer	Vehicle	Installs (hide) An Enterprise performs the initial delivery, integration and configuration of the target Resource. This might be a system integrator, a state DOT Enterprise performing its own installation, or a device supplier that performs on-site installation.
Vehicle Owner	Vehicle Installer	Installation Agreement (hide) An agreement whereupon one party installs a system on behalf of a second party.
Vehicle Owner	Vehicle Verifier	Verification Agreement (hide) An agreement for one party to verify that a system owned by the second party operates according to the system's design.

Operations and Maintenance Stage Roles and Relationships
(hide)

Source	Destination	Role/Relationship
Basic Transit Vehicle Maintainer	Basic Transit Vehicle	Maintains (hide) An Enterprise administers the hardware and software that comprise the target Resource. The entity that takes the 'maintains' role typically is delegated authority by the entity with the "Owns" or "Manages" roles, depending on the environment. The maintainer interacts with the target Resource so as to keep that Resource in the Operational state.
Basic Transit Vehicle Manager	Basic Transit Vehicle	Manages (hide) The Enterprise that is accountable for performing actions with a Resource, typically in support of one of the key operations-related roles (operates, installs, maintains). This authority is typically delegated by the Enterprise with the "Owns" role, and commonly accomplished by delegation to Human E-Objects with the "operates", "installs" or "maintains" roles, depending on the context.
Basic Transit Vehicle Manager	Transit Vehicle Operator	System Usage Agreement (hide) An agreement granting operational use of a system to a Human with the operates role responsible for management of the system.
Basic Transit Vehicle Owner	Basic Transit Vehicle Maintainer	System Maintenance Agreement (hide) An agreement for one party to maintain the operational status of a system on behalf of the party with ownership control of the system.
Basic Transit Vehicle Owner	Basic Transit Vehicle Manager	Operations Agreement (hide) An agreement where one entity agrees to operate a device or application on behalf of another, device/application controlling entity.
Basic Transit Vehicle Owner	Transit Vehicle OBE Maintainer	Maintenance Data Exchange Agreement (hide) An agreement that states one entity will provide data related to maintenance of an application component to the other entity.
Basic Transit Vehicle Owner	Transit Vehicle OBE Owner	Expectation of Data Provision (hide) An expectation where one party believes another party will provide data on a regular and recurring basis, and that that data will be useful to the receiver in the context of the receiver's application. This thus includes some expectation of data fields, timeliness, quality, precision and similar qualities of data.
Basic Transit Vehicle Owner	Transit Vehicle OBE User	Service Usage Agreement (hide) An agreement between the provider of a service and a user. Stipulates the terms and conditions of service usage.
Basic Transit Vehicle Owner	Transit Vehicle Operator	Application Usage Agreement (hide) An agreement in which one entity that controls an application component's use gives the other entity the necessary tools and permission to operate that application or application component.
Basic Transit Vehicle Owner	Transit Vehicle Operator	Vehicle Operating Agreement (hide) An agreement whereupon the controller of a vehicle grants another entity permission and rights to operate the vehicle.
Basic Transit Vehicle Supplier	Basic Transit Vehicle Owner	Warranty (hide) A guarantee or promise made by one entity to another, that provides assurance of the functionality and performance of a subsystem.
Transit Vehicle OBE Maintainer	Transit Vehicle OBE	Maintains (hide) An Enterprise administers the hardware and software that comprise the target Resource. The entity that takes the 'maintains' role typically is delegated authority by the entity with the "Owns" or "Manages" roles, depending on the environment. The maintainer interacts with the target Resource so as to keep that Resource in the Operational state.
Transit Vehicle OBE Manager	Transit Vehicle OBE	Manages (hide) The Enterprise that is accountable for performing actions with a Resource, typically in support of one of the key operations-related roles (operates, installs, maintains). This authority is typically delegated by the Enterprise with the "Owns" role, and commonly accomplished by delegation to Human E-Objects with the "operates", "installs" or "maintains" roles, depending on the context.
Transit Vehicle OBE Manager	Transit Vehicle Operator	System Usage Agreement (hide) An agreement granting operational use of a system to a Human with the operates role responsible for management of the system.
Transit Vehicle OBE Owner	Basic Transit Vehicle Maintainer	Maintenance Data Exchange Agreement (hide) An agreement that states one entity will provide data related to maintenance of an application component to the other entity.
Transit Vehicle OBE Owner	Basic Transit Vehicle Owner	Expectation of Data Provision (hide) An expectation where one party believes another party will provide data on a regular and recurring basis, and that that data will be useful to the receiver in the context of the receiver's application. This thus includes some expectation of data fields, timeliness, quality, precision and similar qualities of data.
Transit Vehicle OBE Owner	Basic Transit Vehicle User	Service Usage Agreement (hide) An agreement between the provider of a service and a user. Stipulates the terms and conditions of service usage.
Transit Vehicle OBE Owner	Transit Vehicle OBE Maintainer	System Maintenance Agreement (hide) An agreement for one party to maintain the operational status of a system on behalf of the party with ownership control of the system.
Transit Vehicle OBE Owner	Transit Vehicle OBE Manager	Operations Agreement (hide) An agreement where one entity agrees to operate a device or application on behalf of another, device/application controlling entity.
Transit Vehicle OBE Owner	Transit Vehicle Operator	Application Usage Agreement (hide) An agreement in which one entity that controls an application component's use gives the other entity the necessary tools and permission to operate that application or application component.
Transit Vehicle OBE Owner	Transit Vehicle Operator	Vehicle Operating Agreement (hide) An agreement whereupon the controller of a vehicle grants another entity permission and rights to operate the vehicle.
Transit Vehicle OBE Owner	Vehicle Maintainer	Maintenance Data Exchange Agreement (hide) An agreement that states one entity will provide data related to maintenance of an application component to the other entity.
Transit Vehicle OBE Owner	Vehicle Owner	Expectation of Data Provision (hide) An expectation where one party believes another party will provide data on a regular and recurring basis, and that that data will be useful to the receiver in the context of the receiver's application. This thus includes some expectation of data fields, timeliness, quality, precision and similar qualities of data.
Transit Vehicle OBE Owner	Vehicle User	Service Usage Agreement (hide) An agreement between the provider of a service and a user. Stipulates the terms and conditions of service usage.
Transit Vehicle OBE Supplier	Transit Vehicle OBE Owner	Warranty (hide) A guarantee or promise made by one entity to another, that provides assurance of the functionality and performance of a subsystem.
Transit Vehicle Operator	Basic Transit Vehicle	Operates (hide) A Human that is accountable for performing actions with a Resource, typically in support of one of the key operations-related roles (operates, installs, maintains). This is the person at the console or behind the wheel.
Transit Vehicle Operator	Transit Vehicle OBE	Operates (hide) A Human that is accountable for performing actions with a Resource, typically in support of one of the key operations-related roles (operates, installs, maintains). This is the person at the console or behind the wheel.
Vehicle Maintainer	Vehicle	Maintains (hide) An Enterprise administers the hardware and software that comprise the target Resource. The entity that takes the 'maintains' role typically is delegated authority by the entity with the "Owns" or "Manages" roles, depending on the environment. The maintainer interacts with the target Resource so as to keep that Resource in the Operational state.
Vehicle Manager	Vehicle	Manages (hide) The Enterprise that is accountable for performing actions with a Resource, typically in support of one of the key operations-related roles (operates, installs, maintains). This authority is typically delegated by the Enterprise with the "Owns" role, and commonly accomplished by delegation to Human E-Objects with the "operates", "installs" or "maintains" roles, depending on the context.
Vehicle Owner	Transit Vehicle OBE Maintainer	Maintenance Data Exchange Agreement (hide) An agreement that states one entity will provide data related to maintenance of an application component to the other entity.
Vehicle Owner	Transit Vehicle OBE Owner	Expectation of Data Provision (hide) An expectation where one party believes another party will provide data on a regular and recurring basis, and that that data will be useful to the receiver in the context of the receiver's application. This thus includes some expectation of data fields, timeliness, quality, precision and similar qualities of data.
Vehicle Owner	Transit Vehicle OBE User	Service Usage Agreement (hide) An agreement between the provider of a service and a user. Stipulates the terms and conditions of service usage.
Vehicle Owner	Transit Vehicle Operator	Application Usage Agreement (hide) An agreement in which one entity that controls an application component's use gives the other entity the necessary tools and permission to operate that application or application component.
Vehicle Owner	Transit Vehicle Operator	Vehicle Operating Agreement (hide) An agreement whereupon the controller of a vehicle grants another entity permission and rights to operate the vehicle.
Vehicle Owner	Vehicle Maintainer	System Maintenance Agreement (hide) An agreement for one party to maintain the operational status of a system on behalf of the party with ownership control of the system.
Vehicle Owner	Vehicle Manager	Operations Agreement (hide) An agreement where one entity agrees to operate a device or application on behalf of another, device/application controlling entity.
Vehicle Supplier	Vehicle Owner	Warranty (hide) A guarantee or promise made by one entity to another, that provides assurance of the functionality and performance of a subsystem.

Functional

This service package includes the following Functional View PSpecs:

Physical Object	Functional Object	PSpec Number	PSpec Name
Transit Vehicle OBE	Transit Vehicle V2V Safety	4.1.1	Process On-Board Systems Data
		4.1.2	Determine Transit Vehicle Service Status
		4.1.3	Provide Transit Vehicle Location Data
Vehicle	Vehicle Basic Safety Communication	3.1.1	Produce Collision and Crash Avoidance Data
		3.1.3	Process Vehicle On-board Data
		3.1.4	Communicate with Remote Vehicles
		3.1.6	Provide Vehicle Acceleration and Deceleration Inputs
		3.2.3.2	Manage Platoon Following
		3.2.3.3	Process Data for Vehicle Actuators
		3.2.3.5.1	Process General Vehicle Sensor Data
		3.2.4	Process Sensor Data for Automatic Vehicle Operations
		6.7.1.3	Process Vehicle Location Data
		6.7.1.4	Update Vehicle Navigable Map Database
		6.7.3.2	Provide Driver Information Interface

Physical

The physical diagram can be viewed in SVG or PNG format and the current format is SVG.
SVG Diagram
PNG Diagram

Display Legend in SVG or PNG

Includes Physical Objects:

Physical Object	Class	Description
Basic Transit Vehicle	Vehicle	The 'Basic Transit Vehicle' represents the transit vehicle that hosts the on-board equipment that provides ITS functions. It includes a specialized and extended databus that is subject to different vehicle databus standards and hosts a broad range of components that are unique to a transit vehicle including the farebox and associated electronics, passenger counters, and transit security systems. The Transit Vehicle may represent a bus, paratransit vehicle, light rail vehicle, or other vehicle designed to carry passengers.
Transit Vehicle OBE	Vehicle	The 'Transit Vehicle On-Board Equipment' (OBE) resides in a transit vehicle and provides the sensory, processing, storage, and communications functions necessary to support safe and efficient movement of passengers. The types of transit vehicles containing this physical object include buses, paratransit vehicles, light rail vehicles, other vehicles designed to carry passengers, and supervisory vehicles. It collects ridership levels and supports electronic fare collection. It supports a traffic signal prioritization function that communicates with the roadside physical object to improve on-schedule performance. Automated vehicle location enhances the information available to the transit operator enabling more efficient operations. On-board sensors support transit vehicle maintenance. The physical object supports on-board security and safety monitoring. This monitoring includes transit user or vehicle operator activated alarms (silent or audible), as well as surveillance and sensor equipment. The surveillance equipment includes video (e.g. CCTV cameras), audio systems and/or event recorder systems. It also furnishes travelers with real-time travel information, continuously updated schedules, transfer options, routes, and fares. A separate 'Vehicle OBE' physical object supports the general vehicle safety and driver information capabilities that apply to all vehicles, including transit vehicles. The Transit Vehicle OBE supplements these general capabilities with capabilities that are specific to transit vehicles.
Transit Vehicle Operator	Vehicle	The 'Transit Vehicle Operator' represents the person that receives and provides additional information that is specific to operating the ITS functions in all types of transit vehicles. The information received by the operator would include status of on-board systems. Additional information received depends upon the type of transit vehicle. In the case of fixed route transit vehicles, the Transit Vehicle Operator would receive operator instructions that might include actions to take to correct schedule deviations. In the case of flexible fixed routes and demand response routes the information would also include dynamic routing or passenger pickup information.
Vehicle	Vehicle	This 'Vehicle' physical object is used to model core capabilities that are common to more than one type of Vehicle. It provides the vehicle-based general sensory, processing, storage, and communications functions that support efficient, safe, and convenient travel. Many of these capabilities (e.g., see the Vehicle Safety service packages) apply to all vehicle types including personal vehicles, commercial vehicles, emergency vehicles, transit vehicles, and maintenance vehicles. From this perspective, the Vehicle includes the common interfaces and functions that apply to all motorized vehicles. The radio(s) supporting V2V and V2I communications are a key component of the Vehicle. Both one-way and two-way communications options support a spectrum of information services from basic broadcast to advanced personalized information services. Advanced sensors, processors, enhanced driver interfaces, and actuators complement the driver information services so that, in addition to making informed mode and route selections, the driver travels these routes in a safer and more consistent manner. This physical object supports all six levels of driving automation as defined in SAE J3016. Initial collision avoidance functions provide 'vigilant co-pilot' driver warning capabilities. More advanced functions assume limited control of the vehicle to maintain lane position and safe headways. In the most advanced implementations, this Physical Object supports full automation of all aspects of the driving task, aided by communications with other vehicles in the vicinity and in coordination with supporting infrastructure subsystems.

Includes Functional Objects:

Functional Object	Description	Physical Object
Transit Vehicle V2V Safety	'Transit Vehicle V2V Safety' exchanges current vehicle location and motion information with other vehicles in the vicinity, uses that information to predict vehicle paths, and notifies the driver when the potential for an impending collision is detected. Information from on-board sensors (e.g., radars and image processing) are used to augment the V2V communications, if available. In addition to notifying the driver, control information can also be provided to support automated control functions that can avoid the collision. This object is similar to the 'Vehicle Basic V2V Safety', but it accounts for crash scenarios that are unique to transit vehicles (e.g., Vehicle Turning Right in Front of Bus). It is also stop-aware since stop locations pose specific crash threats for transit vehicles. Finally, the detection and control algorithms, filters, and timing account for bus performance and risk profiles associated with remote vehicles that are unique to transit.	Transit Vehicle OBE
Vehicle Basic Safety Communication	'Vehicle Basic Safety Communication' exchanges current vehicle characteristics, location, and motion (including past and intended maneuver) information with other vehicles in the vicinity, uses that information to calculate vehicle paths, and warns the driver when the potential for an impending collision is detected. If available, map data is used to filter and interpret the relative location and motion of vehicles in the vicinity. Information from on-board sensors (e.g., radars and image processing) are also used, if available, in combination with the V2V communications to detect non-equipped vehicles and corroborate connected vehicle data. This object represents a broad range of implementations ranging from basic Vehicle Awareness Devices that only broadcast vehicle location and motion and provide no driver warnings to advanced integrated safety systems that coordinate maneuvers and may, in addition to warning the driver, provide collision warning information to support automated control functions that can support control intervention.	Vehicle

Includes Information Flows:

Information Flow	Description
collision warning information	Information provided to support computer-based intervention of vehicle controls. Analogous to driver warnings, these are warnings issued to on-board control systems of an impending collision or other situation detected by the Vehicle OBE that may require control intervention.
host transit vehicle status	Information provided to the ITS on-board equipment from other systems on the Transit Vehicle Platform.
transit vehicle operator display	Visual, audible, and tactile outputs to the transit vehicle operator including vehicle surveillance information, alarm information, vehicle system status, information from the operations center, and information indicating the status of all other on-board ITS services.
transit vehicle operator input	Transit vehicle operator inputs to on-board ITS equipment, including tactile and verbal inputs. Includes authentication information, on-board system control, emergency requests, and fare transaction data.
vehicle location and motion	Data describing the vehicle's location in three dimensions, heading, speed, acceleration, braking status, and size.

Goals and Objectives

Associated Planning Factors and Goals

Planning Factor	Goal
B. Increase the safety of the transportation system for motorized and nonmotorized users;	Reduce fatalities and injuries
C. Increase the security of the transportation system for motorized and nonmotorized users;	Improve security
D. Increase the accessibility and mobility of people and for freight;	Reduce congestion

Associated Objective Categories

Objective Category
Safety: Vehicle Crashes and Fatalities
Transit Operations and Management: Safety

Associated Objectives and Performance Measures

Objective	Performance Measure
Decrease the number of personal safety incidents by X percent within Y years.	Number of reported personal safety incidents.
Increase personal safety ratings by X percent within Y years.	Personal safety and customer service ratings.
Reduce crashes at intersections	Number of crashes and fatalities at signalized intersections
Reduce crashes at intersections	Number of crashes and fatalities at unsignalized intersections
Reduce crashes at intersections	Number of crashes and fatalities related to red-light running
Reduce crashes due to unsafe drivers, vehicles and cargo on the transportation system	Number of crashes and fatalities due to commercial vehicle safety violations
Reduce the number of motorcyclist fatalities by X percent by year Y.	Number of motorcyclist fatalities
Reduce the rate fatalities in the region by X percent by year Y.	Rate of fatalities (rate per vehicle miles travelled (VMT))
Reduce the rate of severe injuries in the region by X percent by year Y.	Rate of serious injuries (rate per VMT)
Reduce the total number of crashes in the region by X percent by year Y.	Total crashes per X VMT.
Reduce the total number of crashes involving bicyclists and pedestrians in the region by X percent by year Y.	Total crashes involving bicycles.
Reduce the total number of crashes involving bicyclists and pedestrians in the region by X percent by year Y.	Total crashes involving pedestrians.
Reduce the total number of fatalities and severe injuries in the region by X percent by year Y.	Total fatalities per X VMT.
Reduce the total number of fatalities and severe injuries in the region by X percent by year Y.	Total severe injuries per X VMT.
Reduce the total number of fatalities in the region by X percent by year Y.	Number of fatalities
Reduce the total number of severe injuries in the region by X percent by year Y.	Number of serious injuries

Since the mapping between objectives and service packages is not always straight-forward and often situation-dependent, these mappings should only be used as a starting point. Users should do their own analysis to identify the best service packages for their region.

Needs and Requirements

Need		Functional Object	Requirement
01	Transit vehicle operators need to receive a warning if surrounding vehicles are a collision threat as the transit vehicle prepares to leave a stop or station.	Transit Vehicle V2V Safety	01	The transit vehicle shall exchange current vehicle location and motion information with other vehicles in the vicinity.
			03	The transit vehicle shall provide a warning to the transit vehicle operator if a nearby vehicle is a collision threat as the transit vehicle prepares to leave a stop or station.
			04	The transit vehicle shall identify if another vehicle is pulling in front of it to make a right turn using location information received from other vehicles.
			05	The vehicle shall broadcast transit vehicle behavioral information (pulling out, about to stop, etc.) to other vehicles in the vicinity.
			06	The vehicle shall acquire transit vehicle trajectory information.
		Vehicle Basic Safety Communication	06	The vehicle shall exchange location and motion information with roadside equipment and nearby vehicles.

Related Sources

Document Name	Version	Publication Date
Transit Safety Retrofit Package Development Applications Requirements Document	Final	5/28/2014
Transit Safety Retrofit Package Development Architecture and Design Specifications	Final	5/19/2014
Transit Safety Retrofit Package Development TRP Concept of Operations	Final	5/28/2014
ConOps for Transit Connected Vehicle	Draft	3/31/2012
SAE J3067- Candidate Improvements to Dedicated Short Range Communications (DSRC) Message Set Dictionary (SAE J2735)Using Systems Engineering Methods		8/15/2014

Security

In order to participate in this service package, each physical object should meet or exceed the following security levels.

Physical Object Security
Physical Object	Confidentiality	Integrity	Availability	Security Class
Basic Transit Vehicle
Transit Vehicle OBE
Vehicle

In order to participate in this service package, each information flow triple should meet or exceed the following security levels.

Information Flow Security
Source	Destination	Information Flow	Confidentiality	Integrity	Availability
Source	Destination	Information Flow	Basis	Basis	Basis
Basic Transit Vehicle	Transit Vehicle OBE	host transit vehicle status	Moderate	Moderate	Moderate
Basic Transit Vehicle	Transit Vehicle OBE	host transit vehicle status	This can include some sensitive data. However, other data, such as vehicle location and motion will then be broadcast. There also may be proprietary information included in this. DISC THEA believes this to be LOW: "sensor data is not confidential; harm should not come from seeing status."	This is used later on to determine whether a vehicle should request priority at an intersection. If this information is incorrect the vehicle may make false requests. All other flows that use the data from this flow have a MODERATE integrity requirement, therefore, this must also have a MODERATE integrity requirement. DISC: THEA believes this should be HIGH: "sensor data needs to be accurate and should not be tampered with."	This information would need to be available immediately for the application to work.DISC: THEA believes this should be HIGH: "sensor data must be consistently available to feed BSMs broadcast at 10Hz, notifications, etc.."
Transit Vehicle OBE	Basic Transit Vehicle	collision warning information	Low	Moderate	Moderate
Transit Vehicle OBE	Basic Transit Vehicle	collision warning information	The information described in this message is the result of an analysis on broadcast data. It would not be difficult for a third party to produce the same message by listening to the broadcast information.	This information is used by automated control systems on the vehicle platform to decide whether to react automatically, for example by braking. We assume that the vehicle platform uses this as only one input to the decision and will also take input from front-facing sensors (for pedestrian detection), rear-facing sensors (to detect possible rear-ending), etc. We strongly recommend that this message is not used as the sole basis for action; if it were to be so used, the integrity requirement might need to be HIGH, but we do not consider this case in detail here.DISC: THEA believes this should be HIGH: "information that provides warnings must be accurate and cannot be tampered with."	This information is just one of a number of inputs to the vehicle platform that may be used to determine whether or not to take evasive action. DISC: THEA believes this should be HIGH: "information that provides warnings must be immediately available for the driver/control systems to react."
Transit Vehicle OBE	Transit Vehicle Operator	transit vehicle operator display	Low	Moderate	Low
Transit Vehicle OBE	Transit Vehicle Operator	transit vehicle operator display	This should not include any sensitive information. It would be possible for a person standing behind the driver to observe the information transmitted.	Some minimal guarantee of data integrity is necessary for all C-ITS flows. This entire application should not directly affect the drivers driving habits. The operator should still be slowing and stopping at yellow or red lights, along with observing all other driving regulations. DISC: Original V2I analysis classified this as LOW.	Even if the operator is not made aware of the signal preemption, the system should still operate correctly. The operator should be using the traffic lights to influence their decision about whether or not to stop, not the display.
Transit Vehicle Operator	Transit Vehicle OBE	transit vehicle operator input	Low	Moderate	Low
Transit Vehicle Operator	Transit Vehicle OBE	transit vehicle operator input	This information is transmitted through systems on board the Transit Vehicle. Even if the vehicle were compromised and these communications monitored, most of this information is directly observable.	Some minimal guarantee of data integrity is necessary for all C-ITS flows. If this is compromised, it could result in an incorrect signal priority request, which has minimal impact. DISC: Original V2I analysis classified this as LOW.	A delay in reporting this may result in a signal priority request not going through, which has minimal impact.

Standards

Currently, there are no standards associated with the physical objects in this service package. For standards related to interfaces, see the specific information flow triple pages.

System Requirements

System Requirement		Need
001	The system shall exchange current vehicle location and motion information with other vehicles in the vicinity	01	Transit vehicle operators need to receive a warning if surrounding vehicles are a collision threat as the transit vehicle prepares to leave a stop or station.
002	The system shall provide a warning to the transit vehicle operator if a nearby vehicle is a collision threat as the transit vehicle prepares to leave a stop or station.	01	Transit vehicle operators need to receive a warning if surrounding vehicles are a collision threat as the transit vehicle prepares to leave a stop or station.
003	The system shall identify if another vehicle is pulling in front of it to make a right turn using location information received from other vehicles.	01	Transit vehicle operators need to receive a warning if surrounding vehicles are a collision threat as the transit vehicle prepares to leave a stop or station.
004	The system shall broadcast transit vehicle behavioral information (pulling out, about to stop, etc.) to other vehicles in the vicinity	01	Transit vehicle operators need to receive a warning if surrounding vehicles are a collision threat as the transit vehicle prepares to leave a stop or station.
005	The system shall acquire transit vehicle trajectory information.	01	Transit vehicle operators need to receive a warning if surrounding vehicles are a collision threat as the transit vehicle prepares to leave a stop or station.
006	The system shall exchange location and motion information with roadside equipment and nearby vehicles.	01	Transit vehicle operators need to receive a warning if surrounding vehicles are a collision threat as the transit vehicle prepares to leave a stop or station.