Tesla MODEL S Operating Manual page 101

Autosteer
Whenever Navigate on Autopilot is active, the
instrument panel displays the driving lane as a
single blue line in front of Model S:
When Navigate on Autopilot is active and you
approach an off-ramp or freeway interchange
along your navigation route, the appropriate
turn signal engages and Autosteer maneuvers
Model S onto the off-ramp or interchange.
Warning: Never depend on Navigate on
Autopilot to determine an appropriate
lane at an off-ramp. Stay alert and
perform visual checks to ensure that the
driving lane is safe and appropriate.
When you leave a controlled-access road (for
example, you exit a freeway or you enter a
section of the navigation route that is no
longer supported), Navigate on Autopilot
reverts back to Autosteer— a unique triple-
tone chime sounds and the instrument panel
displays the driving lane lines in blue (instead
of the single blue in front of Model S). When
you exit onto an off-ramp, the instrument
panel briefly displays a countdown message
warning you of the distance remaining before
Navigate on Autopilot reverts back to
Autosteer.
Note: The way Navigate on Autopilot
determines navigation routes and maneuvers
at freeway interchanges can be impacted by
whether or not the navigation system is set up
to use High Occupancy Vehicle (HOV) lanes.
Therefore, ensure the Use HOV Lanes setting
is appropriate for your circumstances (see
100
Maps and Navigation
setting is off, Navigate on Autopilot never
uses an HOV lane, regardless of time of day. If
the setting is on, Navigate on Autopilot will
always include the use of the HOV lane,
whenever it exists.
Warning: Even when Navigate on
Autopilot deactivates at off-ramps,
Autosteer remains active. Always be
prepared to take appropriate actions such
as stopping at red lights and stop signs,
and yielding to other road users.
Warning: Navigate on Autopilot may not
always attempt to exit at an off-ramp,
even when the exit is determined by the
navigation route. Always remain alert and
be prepared to manually steer onto the
off-ramp, or make a required lane change.
You can cancel Navigate on Autopilot at any
time by touching the Navigate on Autopilot
button on the map's turn-by-turn direction list
(your vehicle reverts back to Autosteer), or by
canceling Autosteer entirely (see
Autosteer on page 97).
Lane Changes
Navigate on Autopilot changes lanes to either
prepare Model S for an upcoming off-ramp, to
increase your driving speed (not to exceed
your set cruising speed), or to move Model S
out of a left-most lane when you are not
passing other vehicles. A message displays at
the top of the map's turn-by-turn direction list
to notify you when an upcoming lane change
is required to stay on your navigation route.
The line on the instrument panel shows the
upcoming driving path:
on page 134). If the
Canceling
Model S Owner's Manual