Tesla MODEL S Operating Manual page 113

Lane Assist
• An object that is mounted to Model S is
interfering with and/or obstructing a
sensor (such as a bike rack or a bumper
sticker).
In addition, Lane Assist may not steer Model S
away from an adjacent vehicle, or may apply
unnecessary or inappropriate steering, in
these situations:
• You are driving Model S on sharp corners
or on a curve at a relatively high speed.
• Bright light (such as from oncoming
headlights or direct sunlight) is interfering
with the view of the camera(s).
• You are drifting into another lane but an
object (such as a vehicle) is not present.
• A vehicle in another lane cuts in front of
you or drifts into your driving lane.
• Model S is traveling slower than 30 mph
(48 km/h) or faster than 90 mph (145
km/h).
• One or more of the ultrasonic sensors is
damaged, dirty, or obstructed (such as by
mud, ice, or snow).
• Weather conditions (heavy rain, snow, fog,
or extremely hot or cold temperatures)
are interfering with sensor operation.
• The sensors are affected by other
electrical equipment or devices that
generate ultrasonic waves.
• An object mounted to Model S (such as a
bike rack or a bumper sticker) is
interfering with or obstructing a sensor.
• Visibility is poor and lane markings are not
clearly visible (due to heavy rain, snow,
fog, etc.).
• Lane markings are excessively worn, have
visible previous markings, have been
adjusted due to road construction or are
changing quickly (for example, lanes
branching off, crossing over, or merging).
Warning: The lists above do not represent
every possible situation that may interfere
with Lane Assist warnings. Lane Assist
may not operate as intended for many
other reasons. To avoid a collision, stay
alert and always pay attention to the
roadway when driving so you can
anticipate the need to take corrective
action as early as possible.
112 Model S Owner's Manual