Connected Vehicle Roadside Equipment --> Transit Vehicle OBE:
intersection status
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.
Transit Vehicle OBE (Destination Physical Object): 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.
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:
- signal_phase_indication_to_transit_vehicle
- signal_phase_response_state_to_transit_vehicle
- signal_phase_timing_to_transit_vehicle
This Triple has the following triple relationships:
Relationship | Source | Destination | Flow |
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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)
Selected Solution
Solution Description
ITS Application Entity
SAE J2735 CEN ISO 19091 SAE J2945/B CTI 4501 |
Click gap icons for more info.
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Mgmt
SAE J3161 3GPP 24.301 3GPP 36.331 |
Facilities
SAE J2735 SAE J2945 |
Security
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TransNet
IEEE 1609.3 |
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Access
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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 |
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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 | ||||
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Confidentiality | Integrity | Availability | ||
Rating | Not Applicable | Moderate | Moderate | |
Basis | This data is intended for all vehicles in the immediate area of the sender. | This information could be used by the transit vehicle to determine whether or not to request priority at the intersection. False information could lead to the vehicle either not making a request, or making an unnecessary request. If the vehicle does not make a request that it should have, it will be forced to wait in traffic longer. The transit 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. | Without this information, vehicle may not properly make requests for priority. The vehicle operator will still use the traffic light to drive safely. A lack of this information will not directly cause harm. The vehicle must know if it does not receive the intersection status. |
Security Characteristics | Value |
---|---|
Authenticable | True |
Encrypt | False |