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SAE J2735-Draft-Rev15 [issued: 01-30-07]
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167 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
12. Vehicle “B” determines whether Vehicle "A’s" message is relevant (calculates its relative
position to the emergency vehicle and determines if a potential interference may exist). If not,
no action is taken; the vehicles may be moving away from each other, on a different street,
etc.
13. If an imminent interference is detected, an alarm of some type is sent to the driver's HMI. It is
assumed that vehicles will have differing levels of HMI sophistication.
14. Data updates continue; When the Vehicle "B" path is no longer a potential interference for
the PSOBE equipped vehicle, the warning will terminate.
Vehicle "A"Hardware Devices:
PSOBE
Positional Sensors
Human-Machine Interface
Vehicle
System
Occupant
Service
Provider
Road Department
Vehicle "A" Actors: (What entities
play an active role in use)
X
X
Vehicle "B" Hardware Devices:
OBE
Positional Sensors
Human-Machine Interface
Occupant
Vehicle
System
Driver
Passenger
Service
Provider
Road Department
Vehicle "B" Actors: (What entities
play an active role in use)
X
X
Support information:
CAMP-VSC Task 3 Report, 2003
4.
System Architecture and Concept of Operation
A PSOBE vehicle is put into emergency service. Upon being put into emergency service, emergency messages
begin being sent to surrounding vehicles. The Emergency Vehicle Approaching Warning message includes:
Location, Direction, Speed, Type of vehicle, Type of response, Siren in use, Light bar in use, and Multiple vehicles
responding (optional).
Private vehicles in the area may use this data to analyze if they may encounter the responding vehicle. If this is
possible, applicable information may be communicated to the operator. The warning can advise the driver to be
prepared to take actions to stay out of the path of the responding vehicle. The warning could include information
about:
The type of emergency vehicle
The location or proximity of the emergency vehicle
Instructions on action that the driver may want to take