Driving -> RSA (Road Sign Assist) for Your Toyota bZ4X SUV Second Generation (2025-2026)

286  
5-4. Using the driving support systems  
of a sign is available from the  
navigation system (if  
equipped), the sign will be  
displayed on the display.  
RSA (Road Sign  
Assist)  
The RSA system detects  
specific road signs using  
the front camera and/or  
navigation system (if  
equipped) (when speed limit  
information is available)  
and warns the driver via dis-  
plays and buzzers.  
Multiple signs can be dis-  
played.  
Depending on the specifications of  
the vehicle, the number of dis-  
played signs may be limited.  
Operating conditions of sign  
display  
Signs will be displayed when the fol-  
lowing conditions are met:  
WARNING  
For safe use  
The system has detected a sign  
Driving safely is solely the  
responsibility of the driver. Pay  
careful attention to the sur-  
rounding conditions in order to  
ensure safe driving.  
In the following situations, a dis-  
played sign may stop being dis-  
played:  
When a new sign has not been  
detected for a certain distance  
Do not rely solely upon the  
RSA. The RSA assists the  
driver by providing road sign  
information, but it is not a  
replacement for the driver’s own  
vision and awareness. Driving  
safely is solely the responsibility  
of the driver. Pay careful atten-  
tion to the surrounding condi-  
tions in order to ensure safe  
driving.  
When the system determines that  
the road being driven on has  
changed, such as after a left or  
right turn  
Situations in which the display  
function may not operate prop-  
erly  
In the following situations, the RSA  
system may not operate properly  
and may not detect signs or may  
display the incorrect sign. However,  
this does not indicate a malfunction.  
Situations in which the RSA  
should not be used  
When a sign is dirty, faded, tilted  
or bent  
When it is necessary to disable  
the system: P.259  
When the contrast of an electronic  
sign is low  
Situations in which the sys-  
tem may not operate properly  
When all or part of a sign is hidden  
by a tree, utility pole, etc.  
Situations in which the sensors  
may not operate properly: P.263  
When a sign is detected by the  
front camera for a short amount of  
time  
Display Function  
When the driving state (turning,  
changing lanes, etc.) is judged  
incorrectly  
When the front camera  
detects a sign or information  
When a sign is immediately after a  
Owners Manual_USA_M42C01_en  
287  
5-4. Using the driving support systems  
freeway junction or in an adjacent  
Operating conditions of the  
lane just before merging  
notification functions  
When stickers are attached to the  
rear of a preceding vehicle  
Excess speed notification function  
This function will operate when the  
following condition is met:  
• A speed limit road sign is recog-  
nized by the system.  
When a sign similar to a system  
compatible sign is detected as a  
system compatible sign  
When a speed limit sign for a  
frontage road is within detection  
range of the front camera  
No entry notification function  
This function will operate when all of  
the following conditions are met:  
• More than one no entry road signs  
are recognized by the system  
simultaneously.  
When driving around a round-  
about  
When a sign intended for trucks,  
etc. is detected  
• The vehicle is passing between no  
entry road signs recognized by the  
system.  
Vehicles with navigation system:  
When the navigation system map  
data is out of date  
Vehicles with navigation system:  
When the navigation system can-  
not be used  
Types of road signs sup-  
ported  
In this case, the speed limit signs  
displayed on the multi-information  
display and navigation system dis-  
play may differ.  
5
The following types of road  
signs can be displayed.  
However, non-standard or recently  
introduced traffic signs may not be  
displayed.  
Notification function  
In the following situations, the  
RSA system will output a warn-  
ing to notify the driver.  
Speed limit  
If the vehicle speed exceeds  
the speed warning threshold  
of the speed limit sign dis-  
played on the display, the sign  
display will be emphasized  
and a buzzer will sound.  
Do Not Enter  
No U-turn  
When the RSA system  
detects a do not enter sign  
and determines that the vehi-  
cle has entered a no-entry  
area, the do not enter sign  
displayed on the display will  
flash and a buzzer will sound.  
No Turn On Red  
Owners Manual_USA_M42C01_en  
288  
5-4. Using the driving support systems  
Dynamic radar cruise  
control  
Stop  
This dynamic radar cruise  
control detects the pres-  
ence of vehicles ahead,  
determines the current vehi-  
cle-to-vehicle distance, and  
operates to maintain a suit-  
able distance from the vehi-  
cle ahead. The desired  
vehicle-to-vehicle distance  
can be set by operating the  
vehicle-to-vehicle distance  
switch.  
Yield  
Warning  
Depending on the specifica-  
tions of the vehicle, signs may  
be displayed overlapping.  
Duplicate display exam-  
ple  
Use the dynamic radar  
cruise control only on high-  
ways and expressways.  
WARNING  
For safe use  
Changing RSA settings  
Driving safely is solely the  
responsibility of the driver. Do  
not overly rely on this system,  
and pay careful attention to the  
surrounding conditions in order  
to ensure safe driving.  
The following settings of the  
RSA can be changed through  
customize settings. (P.573)  
The dynamic radar cruise con-  
trol provides driving assistance  
to reduce the driver’s burden.  
However, there are limitations to  
the assistance provided. Read  
the following items carefully. Do  
not overly rely on this system  
and always drive carefully.  
Conditions under which the sys-  
tem may not operate correctly:  
P.294  
Owners Manual_USA_M42C01_en