 |
 |
 |
 |
|
 |
 |
SAE J2735-Draft-Rev18 [issued: 06-26-07]
-
193 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
Annex A-7 Lane Change Warning
Application Description
This application provides a warning to a vehicle that is about to change lanes. The warning is provided in
order to avoid a collision with vehicles in the intended lane destination of the host vehicle.
Flow of Events
Flow of events
1.
Overtaking Vehicle “A” sends MSG_BasicSafetyMessageFrame, Part I.
2.
Lane-changing Vehicle “B” receives message
3.
Vehicle “B” recognizes that Vehicle A’s message is relevant (by location in
adjacent lane, proximity or rate of overtaking)
4.
Vehicle “B” alerts its driver to a potential overtaking vehicle hazard.
Hardware Devices:
DSRC radio
Positional Sensors
Human-Machine Interface
Occupant
Vehicle
System
Driver
Passenger
Service
Provider
Road
Department
Actors: (What entities
play an active role in use)
X
X
Support information:
CAMP-VSC Task 3 Report, 2003
Concept of Operations
As with the other vehicle safety application scenarios in this annex, DSRC communications is used to allow
the host vehicle to detect all equipped vehicles in the immediate vicinity. As well, the lane-changing
vehicle receives the position, velocity, acceleration, and control parameters, among others, for all these
vehicles through their MSG_BasicSafetyMessageFrame, Part I messages. The in-vehicle unit, based upon
the host vehicle’s turn signal initiation and/or possibly other control parameters like steering wheel
movements, constructs a potential vector for the host vehicle and analyzes the received parameters to
construct expected future vectors for other vehicles in the immediate vicinity. If the in-vehicle unit
determines that a collision would be likely if the indicated lane change maneuver is initiated, an appropriate
warning is issued to the driver.
Sensors and Other System Needs
On-board sensors to determine the host vehicle’s intent to change lanes, e.g., turn signal or other control
parameters, will also be needed.