Tesla S Owner's Manual page 87

Traffic-Aware Cruise Control
Cruising Near or On Freeway Exits
When cruising near an exit on a controlled
access road (such as a highway or freeway)
and engaging the turn signal toward the exit,
Traffic-Aware Cruise Control assumes you are
exiting and begins to slow down the vehicle. If
you do not drive onto the exit, Traffic-Aware
Cruise Control resumes cruising at the set
speed. In a region with right hand traffic, this
occurs only when you engage the right turn
signal when driving in the right-most lane
within 164 feet (50 meters) of an exit. Likewise
in regions with left hand traffic; when
engaging the left turn signal when driving in
the left-most lane within 164 feet (50 meters)
of an exit.
Note: The onboard Global Positioning System
(GPS) determines if you are driving in a region
with right or left hand traffic. In situations
where GPS data is unavailable (for example, if
there is inadequate signal), engaging the turn
signal near an exit does not cause Traffic-
Aware Cruise Control to slow down Model S.
When enabled while on a highway interchange
or off-ramp, Traffic-Aware Cruise Control may
reduce your set speed in 5 mph (5 km/h)
increments – to as slow as 25 mph (40 km/h)
– to better match the reported speeds of
other Tesla vehicles that have driven at that
specific location. To override this and continue
cruising at your set speed, tap the accelerator
pedal or move the cruise stalk. The new set
speed is maintained for the duration of the
interchange or off-ramp (unless you override it
or cancel Traffic-Aware Cruise Control). After
the interchange or off-ramp, the set speed
may revert or change as necessary based on
the new location. For example, if you merged
onto a different highway, the set speed reverts
back to the set speed that was in use before
driving on the interchange.
Warning: In some cases (such as having
insufficient data), Traffic-Aware Cruise
Control may not automatically reduce the
set speed on the highway interchange or
off-ramp. Do not rely on Traffic-Aware
Cruise Control to determine an
appropriate driving speed. Tesla
recommends driving at a speed that is
safe for road conditions and within
posted speed limits.
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Adjust the Following Distance
To adjust the following distance you want to
maintain between Model S and a vehicle
traveling ahead of you, rotate the cruise
control lever to choose a setting from 1 (the
closest following distance) to 7 (the longest
following distance). Each setting corresponds
to a time-based distance that represents how
long it takes for Model S, from its current
location, to reach the location of the rear
bumper of the vehicle ahead of you.
As you rotate the cruise control lever, the
instrument panel displays the current setting.
Release the lever when the desired setting is
displayed.
Note: Your setting is retained until you
manually change it.
Warning: It is the driver's responsibility to
determine and maintain a safe following
distance at all times. Do not rely on
Traffic-Aware Cruise Control to maintain
an accurate or appropriate following
distance.
Warning: Never depend on Traffic-Aware
Cruise Control to adequately slow down
Model S to avoid a collision. Always watch
the road in front of you and stay prepared
to take immediate corrective action.
Overtake Acceleration
When following a vehicle with Traffic-Aware
Cruise Control active, briefly engaging the
turn signal (to indicate a move into the
passing lane) accelerates Model S towards the
vehicle ahead. By momentarily holding the
turn signal lever up or down, you can quickly
accelerate up to your set speed without
having to press the accelerator pedal. The turn
signal causes acceleration only when all of the
following conditions are met:
Model S Owner's Manual