Lexus ES: RSA (Road Sign Assist)
The RSA system recognizes specific
road signs using the front camera
to provide information to the
driver via the display.
If the system judges that the vehicle
is being driven over the speed limit,
performing prohibited actions, etc.
in relation to the recognized road
signs, it alerts the driver using a
warning display and warning
buzzer.
WARNING
■Before using the RSA
Do not rely solely upon the RSA system.
RSA is a system which supports the
driver by providing information, but it is
not a replacement for a driver's own
vision and awareness. Drive safely by
always paying careful attention to the
traffic rules.
Indication on the multi-information
display
When the front camera recognizes a
sign, the sign will be displayed on the
multi-information display.
- When the driving support system information is selected, a maximum
of 3 signs can be displayed.
- When a tab other than the driving
support system information is
selected, only a recognized speed
limit sign or do not enter sign (when
notification is necessary) will be displayed.
If signs other than speed limit signs are recognized,
they will be displayed in an overlapping
stack under the current speed limit
sign.
Supported types of road signs
The following types of road signs,
including electronic signs and blinking
signs, are recognized.
A non-official or a recently introduced traffic
sign may not be recognized.
Speed limit
Do Not Enter
Stop
Yield
Warning display
In the following situations, the RSA system
will alert the driver.
- When the vehicle speed exceeds
the speed warning threshold of the
speed limit sign displayed, the sign
display will be emphasized and a
buzzer will sound.
- When the RSA system recognizes a
do not enter sign and determines
that your vehicle has entered a noentry
area, the displayed sign will
flash and a buzzer will sound.
Depending on the situation, traffic
environment (traffic direction, speed
unit) may be detected incorrectly and a
warning display may not operate properly.
■Setting procedure
1. Press
or
of the meter control
switches and select .
2. Press
or
of the meter control
switches and select "Vehicle Settings",
then press "OK".
3. Press
or
of the meter control
switches and select ,
then press
"OK"
4 Press
or
of the meter control
switches and select "RSA", then press
"OK"
■Automatic turn-off of RSA sign display
In the following situations, a displayed
speed limit sign will stop being displayed
automatically:
- A new sign is not recognized for a certain
distance.
- The road changes due to a left or right
turn, etc.
In the following situations, do not enter, stop
and yield signs will stop being displayed
automatically:
- The system determines that your vehicle
has passed the sign.
- The road changes due to a left or right
turn, etc.
■Conditions in which the function may
not operate or detect correctly
In the following situations, RSA does not
operate normally and may not recognize
signs, display the incorrect sign, etc. However,
this does not indicate a malfunction.
- The front camera is misaligned due to a
strong impact being applied to the sensor,
etc.
- Dirt, snow, stickers, etc. are on the windshield
near the front camera.
- In inclement weather such as heavy rain,
fog, snow or sand storms
- Light from an oncoming vehicle, the sun,
etc. enters the front camera.
- The sign is dirty, faded, tilted or bent, and
if an electronic sign, the contrast is poor.
- All or part of the sign is hidden by the
leaves of a tree, a pole, etc.
- The sign is only visible to the front camera
for a short amount of time.
- The driving scene (turning, lane change,
etc.) is judged incorrectly.
- Even if it is a sign not appropriate for the
currently traveled lane, such a sign exists
directly after a freeway branches, or in an
adjacent lane just before merging.
- Stickers are attached to the rear of the
preceding vehicle.
- A sign resembling a system compatible
sign is recognized.
- Side road speed signs may be detected
and displayed (if positioned in sight of the
front camera) while the vehicle is traveling
on the main road.
- Roundabout exit road speed signs may
be detected and displayed (if positioned
in sight of the front camera) while traveling
on a roundabout.
- The front of the vehicle is raised or lowered
due to the carried load.
- The surrounding brightness is not sufficient
or changes suddenly.
- When a sign intended for trucks, etc. is
recognized.
- The speed information displayed on the
meter and that displayed on the navigation
system may be different due to the
navigation system using map data.
■Speed limit sign display
If the power switch was last turned off while
a speed limit sign was displayed on the
multi-information display, the same sign displays
again when the power switch is turned
to ON mode.
■If "RSA Malfunction Visit Your Dealer"
is shown
The system may be malfunctioning. Have
the vehicle inspected by your Lexus dealer.
■Customization
Some functions can be customized.
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