Lexus NX (2022 year). Manual in english — page 20
■
Sounds and vibrations caused by the ABS, brake assist, VSC, Trailer Sway Control,
TRC and hill-start assist control systems
●
A sound may be heard from the engine compartment when the brake pedal is
depressed repeatedly, when the engine is started or just after the vehicle begins to
move. This sound does not indicate that a malfunction has occurred in any of these
systems.
●
Any of the following conditions may occur when the above systems are operating.
None of these indicates that a malfunction has occurred.
•
Vibrations may be felt through the vehicle body and steering.
•
A motor sound may be heard also after the vehicle comes to a stop.
•
The brake pedal may pulsate slightly after the ABS is activated.
•
The brake pedal may move down slightly after the ABS is activated.
■
Active Cornering Assist operation sounds and vibrations
When the Active Cornering Assist is operated, operation sounds and vibrations may be
generated from the brake system, but this is not a malfunction.
■
EPS and VGRS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be heard. This
does not indicate a malfunction.
■
Automatic reactivation of TRC, Trailer Sway Control and VSC systems
After turning the TRC, Trailer Sway Control and VSC systems off, the systems will be
automatically re-enabled in the following situations:
●
When the engine switch is turned off
●
If only the TRC system is turned off, the TRC will turn on when vehicle speed increases
If both the TRC and VSC systems are turned off, automatic re-enabling will not occur
when vehicle speed increases.
■
Operating conditions of Active Cornering Assist
The system operates when the following occurs.
●
TRC/VSC can operate
●
The driver is attempting to accelerate while turning
●
The system detects that the vehicle is drifting to the outer side
●
The brake pedal is released
■
Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from overheating
when there is frequent steering input over an extended period of time. The steering wheel
may feel heavy as a result.
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Should this occur, refrain from excessive steering input or stop the vehicle and turn the
engine off. The EPS system should return to normal within 10 minutes.
■
Operating conditions of Automatic Rear Flashing Hazard Lights
When the following two conditions are met, the Automatic Rear Flashing Hazard Lights
will operate:
●
The relative speed between your vehicle and the following vehicle is between approxi-
mately 30 and 100 km/h (19 and 62 mph).
●
Your vehicle is being driven at approximately 10 km/h (7 mph) or less or at any speed
with the brake pedal depressed.
■
Situations in which the Automatic Rear Flashing Hazard Lights may not operate
properly
●
In the following situations, the system may not detect a following vehicle properly:
•
When the sensor is misaligned due to a strong impact to the sensor or its surround-
ing area
•
When mud, snow, ice, a sticker, etc. is covering the sensor or surrounding area on
the rear bumper
•
When driving on a road surface that is wet with standing water during bad weather,
such as heavy rain, snow, or fog
•
When driving up and down consecutive steep inclines, such as hills, dips in the road,
etc.
•
When the following vehicle is not approaching from straight behind your vehicle
•
When the following vehicle is approaching from an angle
•
If a vehicle suddenly cuts behind your vehicle
•
When the following vehicle is surrounded by other vehicles
•
When a bicycle carrier or other accessory is installed to the rear of your vehicle
●
In the following situations, the system may operate even though there is no possibility
of a collision
•
When the sensor is misaligned due to a strong impact to the sensor or its surround-
ing area
•
When your vehicle is surrounded by other vehicles
•
When your vehicle is stopped to make a turn at an intersection, etc. and a vehicle
passes your vehicle from straight behind
•
When your vehicle is stopped on the roadside, etc. and a vehicle passes close to the
side of your vehicle
•
When a following vehicle closely approaches your vehicle before overtaking
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•
When a following vehicle suddenly approaches to close to your vehicle
■
Operating conditions of emergency brake signal
When the following conditions are met, the emergency brake signal will operates:
●
The emergency flashers are off.
●
Actual vehicle speed is over 55 km/h (35 mph).
●
The system judges from the vehicle deceleration that it is a sudden braking operation.
■
Automatic system cancelation of emergency brake signal
The emergency brake signal will be canceled in any of the following situations:
●
The emergency flashers are turned on.
●
The system judges from the vehicle deceleration that is not a sudden braking opera-
tion.
■
Secondary Collision Brake operating conditions
The system operates when the SRS airbag sensor detects a collision while the vehicle is in
motion. However, the system does not operate in any of the following situations.
■
Secondary Collision Brake automatic cancelation
The system is automatically canceled in any of the following situations.
●
The vehicle speed drops to approximately 0 km/h(0 mph).
●
A certain amount of time elapses during operation
●
The accelerator pedal is depressed a large amount
WARNING
■
The ABS does not operate effectively when
●
The limits of tire gripping performance have been exceeded (such as excessively worn
tires on a snow covered road).
●
The vehicle hydroplanes while driving at high speed on wet or slick roads.
■
Stopping distance when the ABS is operating may exceed that of normal conditions
The ABS is not designed to shorten the vehicle's stopping distance. Always maintain a
safe distance from the vehicle in front of you, especially in the following situations:
●
When driving on dirt, gravel or snow-covered roads
●
When driving with tire chains
●
When driving over bumps in the road
●
When driving over roads with potholes or uneven surfaces
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WARNING
■
TRC/VSC may not operate effectively when
Directional control and power may not be achievable while driving on slippery road sur-
faces, even if the TRC/VSC system is operating. Drive the vehicle carefully in conditions
where stability and power may be lost.
■
Active Cornering Assist does not operate effectively when
●
Do not overly rely on Active Cornering Assist. Active Cornering Assist may not oper-
ate effectively when accelerating down slopes or driving on slippery road surfaces.
●
When Active Cornering Assist frequently operates, Active Cornering Assist may
temporarily stop operating to ensure proper operation of the brakes, TRC and VSC.
■
Hill-start assist control does not operate effectively when
●
Do not overly rely on hill-start assist control. Hill-start assist control may not operate
effectively on steep inclines and roads covered with ice.
●
Unlike the parking brake, hill-start assist control is not intended to hold the vehicle
stationary for an extended period of time. Do not attempt to use hill-start assist control
to hold the vehicle on an incline, as doing so may lead to an accident.
■
When the TRC/VSC/Trailer Sway Control is activated
The slip indicator light flashes. Always drive carefully. Reckless driving may cause an
accident. Exercise particular care when the indicator light flashes.
■
When the TRC/VSC/Trailer Sway Control systems are turned off
Be especially careful and drive at a speed appropriate to the road conditions.
As these are the systems to help ensure vehicle stability and driving force, do not turn the
TRC/VSC/Trailer Sway Control systems off unless necessary.
Trailer Sway Control is part of the VSC system and will not operate if VSC is turned off or
experiences a malfunction.
■
Replacing tires
Make sure that all tires are of the specified size, brand, tread pattern and total load
capacity. In addition, make sure that the tires are inflated to the recommended tire
inflation pressure level.
The ABS, TRC, Trailer Sway Control and VSC systems will not function correctly if
different tires are installed on the vehicle.
Contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer for further information when replacing tires or wheels.
■
Handling of tires and the suspension
Using tires with any kind of problem or modifying the suspension will affect the driving
assist systems, and may cause a system to malfunction.
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332
WARNING
■
Trailer Sway Control precaution
The Trailer Sway Control system is not able to reduce trailer sway in all situations.
Depending on many factors such as the conditions of the vehicle, trailer, road surface and
driving environment, the Trailer Sway Control system may not be effective. Refer to your
trailer owner's manual for information on how to tow your trailer properly.
■
If trailer sway occurs
Observe the following precautions. Failing to do so may cause death or serious injury.
●
Firmly grip the steering wheel. Steer straight ahead. Do not try to control trailer sway
by turning the steering wheel.
●
Begin releasing the accelerator pedal immediately but very gradually to reduce speed.
Do not increase speed. Do not apply vehicle brakes.
If you make no extreme correction with the steering or brakes, your vehicle and trailer
should stabilize.
■
Secondary Collision Brake
Do not rely solely upon the Secondary Collision Brake. This system is designed to help
reduce the possibility of further damage due to a secondary collision, however, that effect
changes according to various conditions. Overly relying on the system may result in
death or serious injury.
Related Links
Trailer towing (vehicles with towing package)(P. 86)
Tires and wheels(P. 644)
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Using the safe driving support functions
Pre-Collision System
PCS (Pre-Collision System)
The pre-collision system uses sensors to detect objects
in the path of
the vehicle. When the system determines that the possibility of a frontal collision
with a detectable object is high, a warning operates to urge the driver to take
evasive action and the potential brake pressure is increased to help the driver avoid
the collision. If the system determines that the possibility of a collision is extremely
high, the brakes are automatically applied to help avoid the collision or help reduce
the impact of the collision.
The pre-collision system can be disabled/enabled and the warning timing can be changed.
WARNING
■
For safe use
●
Driving safely is solely the responsibility of the driver. Pay careful attention to the
surrounding conditions in order to ensure safe driving. Never use the pre-collision
system in place of normal braking operations. This system cannot help avoid or reduce
the impact of a collision in every situation. Over-reliance on this system to drive the
vehicle safely may lead to an accident resulting in death or serious injury.
●
Although the pre-collision system is designed to help avoid or help reduce the impact
of a collision, its effectiveness may change according to various conditions. Therefore,
it may not always be able to achieve the same level of performance. Read the following
items carefully. Do not overly rely on this system and always drive carefully.
•
For safe use:
■
When to disable the pre-collision system
●
When it is necessary to disable the system:
Detectable objects
The system can detect the following as detectable objects. (Detectable objects
differ depending on the function.)
●
Vehicles
●
Bicycles
●
Pedestrians
●
Motorcycles
*1 :
Detected as a detectable object only when being ridden.
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System functions
■
Pre-collision warning
When the system determines that the possibility
of a collision is high, a buzzer will sound and an
icon and warning message will be displayed on
the multi-information display to urge the driver to
take evasive action.
If the detectable object is a vehicle, moderate
braking will be performed with the warning.
If the system determines that the accelerator
pedal is strongly depressed, the following icon
and message will be displayed on the multi-infor-
mation display.
■
Pre-collision brake assist
If the system determines that the possibility of a collision is high and the brake
operation by the driver is insufficient, the braking power will be increased.
■
Pre-collision brake control
If the system determines that the possibility of a collision is extremely high, the
brakes are automatically applied to help avoid the collision or reduce the impact of
the collision.
If the vehicle is stopped by pre-collision brake control, it will remain stopped until
the brake pedal is depressed.
■
Emergency steering assist
If the system determines that the following con-
ditions are met, assistance will be provided to
help enhance vehicle stability and prevent lane
departure. During assistance, in addition to the
pre-collision warning, the following icon will be
displayed on the multi-information display.
●
The possibility of a collision is high
●
There is sufficient space within the lane to perform evasive steering maneuvers
●
The driver is operating the steering wheel
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Vehicles with active steering function: The brakes and steering are controlled to
help avoid a collision or reduce the impact of a collision, regardless of the evasive
steering maneuvers performed by the driver.
During assistance, the pre-collision warning will operate and a message will be
displayed to warn the driver.
■
Intersection collision avoidance support (left/right turn)
In situations such as the following, if the system determines that the possibility of
a collision is high, the pre-collision warning and pre-collision braking will operate.
Depending on the intersection, assistance may not operate correctly.
●
When turning left/right at an intersection and
crossing the path of an oncoming vehicle
●
When turning left/right and an oncoming pe-
destrian or bicycle is detected
■
Intersection collision avoidance support (crossing vehicles)
At an intersection, etc., if the system determines
that the possibility of a collision with an ap-
proaching vehicle or motorcycle is high, the
pre-collision warning and pre-collision braking
will operate. Depending on the intersection, as-
sistance may not operate correctly.
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Acceleration Suppression at Low Speed
When driving at a low speed, if the accelerator
pedal is strongly depressed and the system de-
termines that there is a possibility of a collision,
engine output will be restrained or the brakes will
be applied weakly to restrict acceleration. During
operation, a buzzer will sound and a warning
indicator and message will be displayed on the
multi-information display.
■
Suspension control
When the system determines that the possibility of a collision is high, the Adaptive
Variable Suspension system
controls the damping force of the shock
absorbers to help maintain an appropriate vehicle posture.
WARNING
■
Pre-collision braking
●
When the pre-collision braking function is operating, a large amount of braking force
will be applied.
●
If the vehicle is stopped by pre-collision braking function, the driver should operate the
brakes as necessary.
●
In the following situations, brake hold will not operate after the pre-collision braking
function has operated. Depending on the situation, the driver should operate the brake
pedal immediately.
•
When the accelerator pedal is depressed
•
When the vehicle is stopped by intersection collision avoidance support
•
When the vehicle is stopped on a steep slope
●
The pre-collision braking function may not operate if certain operations are per-
formed by the driver. If the accelerator pedal is being depressed strongly or the
steering wheel is being turned, the system may determine that the driver is taking
evasive action and possibly prevent the pre-collision braking function from operating.
●
If the brake pedal is being depressed, the system may determine that the driver is
taking evasive action and possibly delay the operation timing of the pre-collision brake
control.
■
Acceleration Suppression at Low Speed function
If the steering wheel is being turned, the system may determine that the driver is taking
evasive action and possibly prevent the Acceleration Suppression at Low Speed function
from operating.
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WARNING
■
Emergency steering assist
●
The emergency steering assist will be canceled when the system determines that lane
departure prevention control has completed.
●
Depending on operations performed by the driver, emergency steering assist may not
operate or operation may be canceled.
•
If the accelerator pedal is depressed strongly, the steering wheel is turned heavily,
the brake pedal is depressed, or the turn signal lever is operated, the system may
determine that the driver is taking evasive action and the emergency steering assist
may not operate.
•
While the emergency steering assist is operating, if the accelerator pedal is
depressed strongly, the steering wheel is turned heavily, or the brake pedal is
depressed, the system may determine that the driver is taking evasive action and
emergency steering assist operation may be canceled.
•
While the emergency steering assist is operating, if the steering wheel is held or
turned in the opposite direction of system operation, emergency steering assist
operation will be canceled.
INFORMATION
■
Operating conditions of each function of the pre-collision system
The pre-collision system is enabled and the system determines that the possibility of a
frontal collision with a detected object is high.
However, the system will not operate in the following situations:
●
When the vehicle has not been driven a certain amount after a terminal of the battery
has been disconnected and reconnected
●
When the shift lever is in R
When the shift position is in R
●
When the VSC OFF indicator is illuminated (only the pre-collision warning function
will be operational)
The following are the operational speeds and cancelation conditions of each function:
●
Pre-collision warning
Detectable ob-
jects
Vehicle speed
Relative speed between your
vehicle and object
Preceding vehi-
cles, stopped ve-
hicles
Approximately 5 to 180
km/h (3 to 110 mph)
Approximately 5 to 180 km/h
(3 to 110 mph)
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Detectable ob-
jects
Vehicle speed
Relative speed between your
vehicle and object
Oncoming vehi-
cles
Approximately 30 to 180
km/h (20 to 110 mph)
Approximately 80 to 220
km/h (50 to 130 mph)
Bicycles
Approximately 5 to 80 km/h
(3 to 50 mph)
Approximately 5 to 80 km/h (3
to 50 mph)
Pedestrians
Approximately 5 to 80 km/h
(3 to 50 mph)
Approximately 5 to 80 km/h (3
to 50 mph)
Preceding motor-
cycles, stopped
motorcycles
Approximately 5 to 180
km/h (3 to 110 mph)
Approximately 5 to 80 km/h (3
to 50 mph)
Oncoming motor-
cycles
Approximately 30 to 180
km/h (20 to 110 mph)
Approximately 30 to 180 km/h
(20 to 110 mph)
While the pre-collision warning is operating, if the steering wheel is operated heavily
or suddenly, the pre-collision warning may be cancelled.
●
Pre-collision brake assist
Detectable objects
Vehicle speed
Relative speed between your
vehicle and object
Preceding vehi-
cles, stopped vehi-
cles
Approximately 30 to 180
km/h (20 to 110 mph)
Approximately 10 to 180 km/h
(7 to 110 mph)
Bicycles
Approximately 30 to 80
km/h (20 to 50 mph)
Approximately 30 to 80 km/h
(20 to 50 mph)
Pedestrians
Approximately 30 to 80
km/h (20 to 50 mph)
Approximately 30 to 80 km/h
(20 to 50 mph)
Preceding motor-
cycles, stopped
motorcycles
Approximately 30 to 180
km/h (20 to 110 mph)
Approximately 10 to 80 km/h
(7 to 50 mph)
●
Pre-collision braking
Detectable ob-
jects
Vehicle speed
Relative speed between your
vehicle and object
Preceding vehi-
cles, stopped ve-
hicles
Approximately 5 to 180
km/h (3 to 110 mph)
Approximately 5 to 180 km/h
(3 to 110 mph)
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Detectable ob-
jects
Vehicle speed
Relative speed between your
vehicle and object
Oncoming vehi-
cles
Approximately 30 to 180
km/h (20 to 110 mph)
Approximately 80 to 220
km/h (50 to 130 mph)
Bicycles
Approximately 5 to 80 km/h
(3 to 50 mph)
Approximately 5 to 80 km/h (3
to 50 mph)
Pedestrians
Approximately 5 to 80 km/h
(3 to 50 mph)
Approximately 5 to 80 km/h (3
to 50 mph)
Preceding motor-
cycles, stopped
motorcycles
Approximately 5 to 180
km/h (3 to 110 mph)
Approximately 5 to 80 km/h (3
to 50 mph)
Oncoming motor-
cycles
Approximately 30 to 180
km/h (20 to 110 mph)
Approximately 30 to 180 km/h
(20 to 110 mph)
If either of the following occur while the pre-collision braking function is operating, it
will be canceled:
•
The accelerator pedal is strongly depressed
•
The steering wheel is operated heavily or suddenly
●
Emergency steering assist
The emergency steering assist will not operate when the turn signal lights are flashing.
Detectable objects
Vehicle speed
Relative speed between your
vehicle and object
Preceding vehicles,
stopped vehicles, bicy-
cles, pedestrians, mo-
torcycles
Approximately 40 to 80
km/h (25 to 50 mph)
Active steering function: *
to 80 km/h (* to 50 mph)
Approximately 40 to 80
km/h (25 to 50 mph)
Active steering function: * to
80 km/h (* to 50 mph)
*Minimum vehicle speed: Vehicle speed at which evasion using pre-collision brake
control is difficult
While the emergency steering assist is operating, if any of the following are performed,
emergency steering assist operation may be cancelled:
•
The accelerator pedal is strongly depressed
•
The steering wheel is operated heavily or suddenly
•
The brake pedal is depressed
●
Intersection collision avoidance support (left/right turn)
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The intersection collision avoidance support (for left/right turning vehicles) will not
operate when the turn signal lights are not flashing.
Detectable
objects
Vehicle speed
Oncoming vehi-
cle speed
Relative speed between
your vehicle and object
Oncoming
vehicles
Approximately 5 to 40
km/h (3 to 25 mph)
Approximately
5 to 75 km/h (3
to 45 mph)
Approximately 10 to 115
km/h (7 to 70 mph)
Pedestrians
Approximately 5 to 30
km/h (3 to 20 mph)
-
Approximately 5 to 40
km/h (3 to 25 mph)
Bicycles
Approximately 5 to 30
km/h (3 to 20 mph)
-
Approximately 5 to 50
km/h (3 to 30 mph)
Oncoming
motorcycles
Approximately 5 to 40
km/h (3 to 25 mph)
Approximately
5 to 75 km/h (3
to 45 mph)
Approximately 10 to 115
km/h (7 to 70 mph)
●
Intersection collision avoidance support (crossing vehicles)
Detecta-
ble objects
Vehicle speed
Crossing vehicle speed
Relative speed be-
tween your vehicle
and object
Vehicles
(side)
Approximately 5
to 60 km/h (3 to
38 mph)
●
Your vehicle speed or
less
●
Approximately 40 km/h
or less (25 mph or less)
Approximately 5 to
60 km/h (3 to 38
mph)
Motorcy-
cles (side)
Approximately 5
to 60 km/h (3 to
38 mph)
●
Your vehicle speed or
less
●
Approximately 40 km/h
or less (25 mph or less)
Approximately 5 to
60 km/h (3 to 38
mph)
●
Acceleration Suppression at Low Speed
The Acceleration Suppression at Low Speed function will not operate when the turn
signal lights are flashing.
Detectable ob-
jects
Vehicle speed
Relative speed between your ve-
hicle and object
Preceding vehi-
cles, stopped ve-
hicles
Approximately 0 to 15 km/h
(0 to 9 mph)
Approximately 0 to 15 km/h (0 to
9 mph)
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Detectable ob-
jects
Vehicle speed
Relative speed between your ve-
hicle and object
Bicycles
Approximately 0 to 15 km/h
(0 to 9 mph)
Approximately 0 to 15 km/h (0 to
9 mph)
Pedestrians
Approximately 0 to 15 km/h
(0 to 9 mph)
Approximately 0 to 15 km/h (0 to
9 mph)
While the Acceleration Suppression at Low Speed function is operating, if any of
the following are performed, the low speed sudden acceleration suppression function
operation will be cancelled:
•
The accelerator pedal is released.
•
The steering wheel is operated heavily or suddenly
■
Detection of detectable objects
Objects are detected based on their size, shape, and
movement. Depending on the ambient brightness,
movement, posture and direction of a detectable ob-
ject, it may not be detected and the system may 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 determine that the possibili-
ty of a collision is high and operate:
•
When passing a detectable object
•
When changing lanes while overtaking a detectable object
•
When suddenly approaching a detectable object
•
When approaching a detectable object or other object on the roadside, such as
guardrails, utility poles, trees, walls, etc.
•
When there is a detectable object or other ob-
ject by the roadside at the entrance of a curve
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•
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 struc-
ture 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 or pedestrian crosses in front of
the vehicle
•
When attempting to turn left/right in front of an oncoming vehicle or pedestrian
•
When turning left/right and an oncoming vehicle or pedestrian stops immediately
before entering the path of the vehicle
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•
When turning left/right and an oncoming vehi-
cle turns left/right in front of the vehicle
•
When the steering wheel is operated toward the path of an oncoming vehicle
■
Situations in which the system may not operate properly
●
In certain situations, such as the following, a detectable object may not be detected by
the front sensors, and the system may not operate properly:
•
When a detectable object is approaching your vehicle
•
When your vehicle or a detectable object is wandering
•
When a detectable object makes an abrupt maneuver (such as sudden swerving,
acceleration or deceleration)
•
When suddenly approaching a detectable object
•
When the detectable object is near a wall, fence, guardrail, manhole cover, steel
plate on the road surface, or another 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, is reflecting off of a detectable object
•
When a detectable object is white and looks extremely bright
•
When the color or brightness of a detectable object causes it to blend in with its
surroundings
•
When a detectable object cuts in front of or suddenly emerges in front of your
vehicle
•
When approaching a vehicle which is diagonal
•
If a vehicle ahead is a child sized bicycle, is carrying a large load, is carrying an extra
passenger, or has an unusual shape (bicycles equipped with a child seat, tandem
bicycles, etc.)
•
If a pedestrian or bicycle is shorter than approximately 1 m (3.2 ft.) or taller than
approximately 2 m (6.5 ft.).
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