2023 TOYOTA PRIUS PRIME traffic

2855-5. Using the driving support systems
5
Driving
■AHB (Automatic High
Beam)
 P.272
■PCS (Pre-Collision System)
 P.293
■LTA (Lane Tracing Assist)
 P.305
■LDA (Lane Departure Alert)
 P.313
■LCA (Lane Change Assist)*
P.310
■FCTA (Front Cross Traffic
Alert)
*
P.326
■PDA (Proactive Driving
Assist)
 P.320
■RSA (Road Sign Assist)*
P.329
■Dynamic radar cruise con-
trol
 P.331
■Cruise control
 P.342
■Emergency Driving Stop
System
 P.345
■Traffic Jam Assist*
P.348
■Driver monitor*
P.292
*: If equipped
Various sensors are used to
obtain the necessary informa-
tion for system operation.
WARNING
●When using an automatic car
wash
●When a sensor is misaligned or
deformed due to a strong
impact being applied to the sen-
sor or the area around the sen-
sor
●When accessories which
obstruct a sensor or light are
temporarily installed to the vehi-
cle
●When a compact spare tire or
tire chains are installed to the
vehicle or an emergency tire
puncture repair kit has been
used
●When the tires are excessively
worn or the inflation pressure of
the tires is low
●When tires other than the manu-
facturer specified size are
installed
●When the vehicle cannot be
driven stably, due to a collision,
malfunction, etc.
Driving assist system
Sensors used by Toyota
Safety Sense 3.0

2895-5. Using the driving support systems
5
Driving
■Precautions for use
It is necessary to enter a connected
services contract, provided by
Toyota, to use these functions. For
details, contact your Toyota dealer.
●LCA (Lane Change Assist)
 P.310
●Radar Cruise Control: Extended
resume time
 P.331
●Traffic Jam Assist
 P.348
■Situations in which the sensors
may not operate properly
●When the height or inclination of
the vehicle has been changed due
to modifications
●When the windshield is dirty,
fogged up, cracked or damaged
●When the ambient temperature is
high or low
●When mud, water, snow, dead
insects, foreign matter, etc., is
attached to the front of the sensor
●When in inclement weather such
as heavy rain, fog, snow, or a
sandstorm
●When water, snow, dust, etc. is
thrown up in front of the vehicle, or
when driving through mist or
smoke
●When the headlights are not illu-
minated while driving in the dark,
such as at night or when in a tun-
nel
●When the lens of a headlight is
dirty and illumination is weak
●When the headlights are mis-
aligned
●When a headlight is malfunction-
ing
●When the headlights of another
vehicle, sunlight, or reflected light
shines directly into the front cam-
era
●When the brightness of the sur-
rounding area changes suddenly
●When driving near a TV tower,
broadcasting station, electric
power plant, radar equipped vehi-
cles, etc., or other location where
WARNING
●Do not subject the driver moni-
tor camera or its surrounding
area to strong impact.
If subjected to a strong impact,
the driver monitor camera may
move out of alignment and the
driver may no longer be detected
correctly. In this case, have the
vehicle inspected by your Toyota
dealer.
●Do not disassemble or modify
the driver monitor camera.
●Do not attach accessories,
stickers (including transparent
stickers), etc. to the driver moni-
tor camera or its surrounding
area.
●Do not allow the driver monitor
camera or its surrounding area
to get wet.
●Do not cover the driver monitor
camera or place anything in
front of it.
●Keep the lens of the driver mon-
itor camera free from damage.
●Do not touch the lens of the
driver monitor came ra or allow it
to become dirty.
When there is dirt or fingerprints
on the camera lens, clean it with a
dry, soft cloth so as to not mark or
damage it.
●When cleaning the lens, do not
use detergents or organic sol-
vents that may damage plastic.

3025-5. Using the driving support systems
not operate properly.
The system detects shapes, such
as the following, as detectable
objects.
■Situations in which the system
may operate even though the
possibility of a collision is not
high
●In certain situations, such as the
following, the system may deter-
mine that the possibility of a colli-
sion is high and operate:
• When passing a detectable object
• When changing lanes while over- taking a detectable object
• When suddenly approaching a detectable object
• When approaching a detectable
object or other object on the road-
side, such as guardrails, utility
poles, trees, walls, etc.
• When there is a detectable object or other object by the roadside at
the entrance of a curve
• When there are patterns or a painting ahead of the vehicle that
may be mistaken for a detectable
object
• When passing a detectable object
that is changing lanes or turning
left/right • When passing a detectable object
which is stopped to make a
left/right turn
• When a detectable object stops immediately before entering the
path of the vehicle
• When passing through a location with a structure above the road
(traffic sign, billboard, etc.)
• When approaching an electric toll gate barrier, parking lot barrier, or
other barrier that opens and
closes
• When turning left/right and an oncoming vehicle, oncoming
motorcycle, pedestrian or bicycle
crosses in front of the vehicle
• When attempting to turn left/right in front of an oncoming vehicle,
oncoming motorcycle, pedestrian
or bicycle
• When turning left/right and an
oncoming vehicle, oncoming
motorcycle, pedestrian or bicycle
stops or changes course immedi-
ately before entering the path of

3045-5. Using the driving support systems
vehicle
• When turning left/right and the direction of the vehicle differs
greatly from the direction traffic
flows in the oncoming lane
• When turning left/right, a pedes- trian or bicycle behind the vehicle
comes in front of it as if it over-
takes the vehicle
• When at an intersection, the approaching crossing vehicle is
long in overall le ngth, such as a
large truck, towing trailer, etc.
●In addition to the preceding, in
certain situations, such as the fol-
lowing, the emergency steering
assist may not operate properly:
• When a detectable object is too
close to the vehicle
• When there is insufficient space to perform evasive steering maneu-
vers or an obstruction exists in the
evasion direction
• When there is an oncoming vehi-
cle
●In addition to the preceding, in
certain situations, such as the fol-
lowing, walls may not be detected
as a target object and the Acceler-
ation Suppression at Low Speed
function may not operate properly:
• When scenery behind the wall is visible, such as a glass door, grid
fence, etc. • When the wall is slanted or low
• When the wall is narrow, such as
a pole, etc.
• When the wall is made of plants, such as a hedge, etc.
• When the road, etc. is reflected on
the wall
• When the vehicle is approaching the wall at an angle
 The pre-collision system can
be enabled/disabled through
a customize setting.
( P.626)
The system is enabled each time
the power switch is turned to ON.
When the system is disabled,
the PCS warning light will illu-
minate and a message will be
displayed on the multi-infor-
mation display.
 The pre-collision setting can
be changed on the customize
settings. ( P.626)
 Vehicles without active steer-
ing function: When the pre-
collision warning timing is
changed, the emergency
steering assist timing will also
be changed.
When later is selected, the
emergency steering assist will
not operate in most cases.
 Vehicles with active steering
function: When the pre-colli-
sion warning timing is
changed, the emergency
steering assist (excluding the
Changing the pre-colli-
sion setting

3055-5. Using the driving support systems
5
Driving
active steering function) tim-
ing will also be changed.
When later is selected, the
emergency steering assist
(excluding the active steering
function) will not operate in most
cases.
 Vehicles with a driver monitor
camera: When the system
determines that the driver is
not facing forward, the pre-
collision warning and emer-
gency steering assist will
operate at the earlier timing,
regardless of the user setting.
 When the dynamic radar
cruise control is operating, the
pre-collision warning will
operate at the earlier timing,
regardless of the user setting.
 Vehicles with Traffic Jam
Assist: When the Traffic Jam
Assist is operating, the pre-
collision warning will operate
at the earlier timing, regard-
less of the user setting. 
When driving on a road with
clear lane lines with the
dynamic radar cruise control
operating, lane lines and pre-
ceding and surrounding vehi-
cles are detected using the
front camera and radar sen-
sor, and the steering wheel is
operated to maintain the vehi-
cle’s lane position.
Use this function only on highways
and expressways.
If the dynamic radar cruise control
is not operating, the function will not
operate.
In situations where the lane lines
are difficult to see or are not visible,
such as when in a traffic jam, sup-
port will be provi ded using the path
of preceding and surrounding vehi-
cles.
If the system determines that the
steering wheel has not been oper-
ated for a certain amount of time or
the steering wheel is not being
firmly gripped, the driver will be
alerted and this function will be
temporarily canceled.
If the steering wheel is firmly
gripped, the f unction will begin
operating again.
LTA (Lane Tracing
Assist)
LTA functions

3235-5. Using the driving support systems
5
Driving
rounding conditions
●In the following situations, system
operation may be canceled:
• When the brake control or output restriction control of a driving sup-
port system operates (For exam-
ple: PCS, drive-start control)
• When the system determines that
a detected object has moved
away from the vehicle
• When lane lines can no longer be
detected
• When the brake pedal has been depressed
• When the accelerator pedal has been depressed
• When the steering wheel has
been operated with more than a
certain amount of force
• When the turn signal lever is oper-
ated to the left/right turn position
WARNING
■Situations in which the sys-
tem may not operate properly
●Situations in which the lane may
not be detected: P.291
●When a detectable object stops
immediately before entering the
path of the vehicle
●When passing extremely close
to a detectable object behind a
guardrail, fence, etc.
●When changing lanes while
overtaking a detectable object
●When passing a detectable
object that is changing lanes or
turning left/right
●When there are objects (guard-
rails, power poles, trees, walls,
fences, poles, traffic cones,
mailboxes, etc.) in the surround-
ing area
●When there are patterns or a
painting ahead of the vehicle
that may be mistaken for a
detectable object
●When passing through a place
with a low structure above the
road (tunnel with a low ceiling,
traffic sign, signboard, etc.)
●When driving on snowy, icy, or
rutted roads
●When a detectable object is
approaching your vehicle
●When your vehicle or a detect-
able object is wandering
●When the movement of a
detectable object changes
(change in direction, sudden
acceleration or deceleration,
etc.)
●When suddenly approaching a
detectable object
●When a preceding vehicle or
motorcycle is not directly in front
of your vehicle
●When there is a structure above
a detectable object
●When part of a detectable
object is hidden by another
object (large luggage, umbrella,
guardrail, etc.)
●When multiple detectable
objects are overlapping
●When a bright light, such as the
sun or headlights of another
vehicle, is reflecting off of the
detectable object
●When the detectable object is
white and looks extremely bright
●When the color or brightness of
the detectable object causes it
to blend in with its surroundings
●When a detectable object cuts
in front of or emerges from
beside a vehicle

3265-5. Using the driving support systems
●When assistance to a detectable
object crossing the road or assis-
tance to a detectable object on the
side of the road is performed and
the system determines the driver
is not holding the steering wheel
If no operations are detected for a
certain amount of time, a buzzer will
sound, the warning will operate.
This warning may also operate if the
driver only operates steering wheel
a small amount continuously.
■Warning operation after preced-
ing vehicle deceleration assis-
tance has ended
After preceding vehicle decelera-
tion assistance has ended, if the
driver does not operate the brake
pedal or accelerator pedal and the
vehicle approaches the preceding
vehicle, the display will flash and a
buzzer will sound to urge the driver
to decelerate. If the system deter-
mines that the driver is operating the
brake pedal or accelerator pedal,
the warning will be canceled.
*: If equipped
 When the system detects a
vehicle approaching from the
left or right in front of your
vehicle when approaching an
intersection, a notification will
be displayed.
 When the system determines
that your vehicle may be
about to enter an intersection
even though a vehicle is
approaching from the left or
right in front of your vehicle, a
buzzer will sound and a mes-
sage will be displayed to urge
you to depress the brake
pedal.
• Multi-information display
FCTA (Front Cross
Traffic Alert)*
When approaching an inter-
section, etc., at a low speed,
vehicles approaching from
the left and right of the front
of the vehicle can be
detected and the driver
informed of these vehicles.
FCTA system control

3275-5. Using the driving support systems
5
Driving
■FCTA system operating condi-
tions
The system will operate when all of
the following conditions are met:
●A shift position other than P or R is
selected
●The vehicle speed is approxi-
mately 10 mph (15 km/h) or less
●A vehicle is approaching from the
left or right in front of your vehicle
at a speed between approximately
7 to 37 mph (10 to 60 km/h)
●There are no vehicles in front of your vehicle
●The accelerator pedal is not being
strongly depressed
●The brake pedal is not being
strongly depressed
■Situations in which the system
may operate even though no
vehicles are approaching
In certain situations, such as the fol-
lowing, the system may operate
even though no vehicles are
approaching:
●When approaching objects on the
roadside, such as guardrails, traf-
fic signs, utility poles, street lights,
trees, tall grass, walls, etc.
●When passing an object on the
side of the road, such as a parked
vehicle
●When a vehicle or pedestrian is
approaching from the left or right
in front of your vehicle in the dis-
tance
●When a vehicle or pedestrian is
moving within a parking spot, etc.,
next to the lane your vehicle is in
●When a pedestrian or bicyclist is
approaching on a sidewalk
●When a vehicle or pedestrian is
moving away from your vehicle
●When an approaching vehicle is
decelerating or stops
●When an approaching vehicle
makes a left/right turn immediately
in front of your vehicle
●When a pedestrian is approaching
your vehicle
●When an oncoming vehicle makes
a right/left turn
●When your vehicle enters an inter-
section before a vehicle
approaching from the left or right
in front of your vehicle
●When stopped at traffic light and a
vehicle approaches from the left
or right in front of your vehicle
●When making a left/right turn in
WARNING
■For safe use
Driving safely is solely the respon-
sibility of the driver. Pay careful
attention to the surrounding con-
ditions in order to ensure safe
driving. The FCTA system is a
supplementary system that
informs the driver of vehicles
approaching from the left and
right of the front of the vehicle.
Over-reliance on this system may
lead to an accident resulting in
death or serious injury. The
details of the warning display may
differ from the actual traffic condi-
tions. Although the warning dis-
play will stop being displayed after
a certain amount of time, this
does not necessarily indicate that
there are no longer any vehicles
or pedestrians around your vehi-
cle.