Speed Assist - Tesla 3 2018 Owner's Manual

Speed Assist

How Speed Assist Works
When the Speed Limit Warning is turned on,
the touchscreen displays a speed limit as
determined by GPS data. You can touch this
speed limit sign to automatically change the
set speed to the detected speed limit
(including any offsets that you have set).
Warnings (described later) take effect when
you exceed this limit.
In situations where Speed Assist is unable to
determine a speed limit (for example, speed
limit signs and GPS data are not available at
the current location), or if Speed Assist is
uncertain that an acquired speed limit is
accurate (for example, although a speed limit
sign was initially detected, some time has
passed before a subsequent sign has been
detected), the touchscreen may not display a
speed limit sign and warnings do not take
effect.
If you set the speed limit warning to Display
(see Controlling Speed Assist
and exceed the determined speed limit, the
speed limit sign on the touchscreen increases
in size.
If you set the speed limit warning to Chime
(see Controlling Speed Assist
and exceed the determined speed limit, the
speed limit sign on the touchscreen increases
in size and Model 3 also sounds a warning
chime.
Note: Speed limit warnings go away after ten
seconds, or when Model 3 slows down below
the specified limit.
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Warning: Do not rely on Speed Assist to
determine the appropriate speed limit or
driving speed. Always drive at a safe
speed based on traffic and road
conditions.
Controlling Speed Assist
To adjust the Speed Limit Warning setting,
touch Controls > Autopilot > Settings >
Speed Limit Warning, then choose one of
these options:
• Off - Speed limit warnings do not display
and chimes are not sounded.
• Display - Speed limit signs display on the
touchscreen and the sign increases in size
when you exceed the determined limit.
• Chime - In addition to the visual display, a
chime is sounded whenever you exceed
the determined speed limit.
You can also specify how the speed limit is
determined:
• Relative - The speed limit is determined
automatically based on detected traffic
signs and GPS data. If desired, you can set
a speed limit offset (+ or -) if you want to
be alerted only when you exceed the
offset speed limit by a specified amount.
For example, you can increase the offset
to +10 mph (10 km/h) if you only want to
be warned when you exceed the speed
limit by 10 mph (10 km/h).
• Absolute - Manually specify any speed
limit between 20 and 140 mph (30 and
240 km/h).
Note: GPS data is not always accurate. The
GPS can miscalculate a road's location and
provide the speed limit for a directly adjacent
road that may have a different speed limit. For
example, the GPS can assume Model 3 is on a
freeway or highway when it is actually on a
nearby surface street, and vice versa.
Note: Your chosen setting is retained until you
manually change it.
Limitations and Inaccuracies
Speed Assist may not be fully functional or
may provide inaccurate information in these
situations:
• The speed limits stored in the GPS
database are incorrect or outdated.
• Model 3 is being driven in an area where
GPS data is not available.
Model 3 Owner's Manual