Traffic-Aware Cruise Control
Traffic-Aware Cruise Control determines when there is a vehicle in front of you in the same lane. If the area in front of Model S is clear, Traffic-Aware Cruise Control maintains a set driving speed. When a vehicle is detected, Traffic-Aware Cruise Control is designed to slow down Model S as needed to maintain a selected time-based distance from the vehicle in front, up to the set speed. Traffic-Aware Cruise Control does not eliminate the need to watch the road in front of you and to manually apply the brakes when needed.
Traffic-Aware Cruise Control is primarily intended for driving on dry, straight roads, such as highways and freeways.
To Use Traffic-Aware Cruise Control
To initiate Traffic-Aware Cruise Control when no vehicle is detected ahead of you, you must be driving at least 18 mph (30 km/h), unless certain vehicle and environmental conditions are met, in which case, you may be able to initiate it at lower speeds. If a vehicle is detected ahead of you, you can initiate Traffic-Aware Cruise Control at any speed, even when stationary, provided Model S is at least 5 feet (150 cm) behind the detected vehicle and certain vehicle and environmental conditions are met.
- Touch Double Click to allow you to use Traffic-Aware Cruise Control independently of Autosteer when you single press the right scroll wheel.NoteIf Autosteer Activation is set to single-click, pressing the right scroll wheel once also activates Autosteer (which includes Traffic-Aware Cruise Control).
- You can choose whether Traffic-Aware Cruise Control engages at the currently detected speed limit or your current driving speed. Touch Speed Limit or Current Speed. If you choose to engage Traffic-Aware Cruise Control at the currently detected speed limit, you can specify an offset. Touch . You can choose a Fixed offset, in which the cruising speed adjusts by a specific number of mph (km/h) on all roads, or a Percentage offset, in which the cruising speed is adjusted as a percentage of the road's detected speed limit. and choose either
- To engage Traffic-Aware Cruise Control, press the right scroll wheel.NoteIf the setting for Autosteer Activation is set to Single Click (touch ), Autosteer engages.
- To change your speed while using Traffic-Aware Cruise Control, you can use the right scroll wheel. For details, see Changing the Cruising Speed.
- To cancel Traffic-Aware Cruise Control, press the right scroll wheel, or press the brake pedal. See Canceling and Resuming for more information.
Changing the Cruising Speed
Roll the right scroll wheel up to increase, or down to decrease, the set speed. Slowly rolling the scroll wheel changes the set speed in 1 mph (1 km/h) increments and quickly rolling the scroll wheel changes the set speed to the closest 5 mph (5 km/h) increment.
Cruising at the Set Speed
Traffic-Aware Cruise Control maintains your set cruising speed whenever a vehicle is not detected in front of Model S. When cruising behind a detected vehicle, Traffic-Aware Cruise Control accelerates and decelerates Model S as needed to maintain a chosen following distance (see Adjust the Following Distance), up to the set speed.
Traffic-Aware Cruise Control also adjusts the cruising speed when entering and exiting curves.
You can manually accelerate at any time when cruising at a set speed, but when you release the accelerator, Traffic-Aware Cruise Control resumes cruising at the set speed.
When following a vehicle, Traffic-Aware Cruise Control remains active at low speeds, even when Model S comes to a full stop. When the vehicle is moving again, Traffic-Aware Cruise Control resumes operating at the set speed. However, under the following circumstances, Traffic-Aware Cruise Control goes into a HOLD state, in which case, you need to briefly press the accelerator pedal to resume cruising. When the HOLD status is active, the instrument panel displays the HOLD icon and a message that indicates that you need to resume cruise control. The following circumstances can cause Traffic-Aware Cruise Control to go into the HOLD state:
- Model S has been at a standstill for 5 minutes.
- Model S detects a pedestrian (the HOLD state may clear when the pedestrian is no longer detected).
- Model S suddenly loses visibility of the vehicle in front of you.
- The ultrasonic sensors detect an obstacle in front of Model S.
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.
When cruising onto an on-ramp to a controlled access road (such as a highway or freeway), Traffic-Aware Cruise Control automatically adjusts the set cruising speed to the speed limit of the highway, plus any offset you have specified (see Speed Assist).
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. 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.
Adjust the Following Distance
To adjust the following distance you want to maintain between Model S and a vehicle traveling ahead of you, touch and 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.
When following a vehicle with Traffic-Aware Cruise Control active, 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, 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:
- Traffic-Aware Cruise Control is operating and detects a vehicle in front of you.
- No obstacles or vehicles are detected in the target lane.
- Model S is traveling below the set speed, but over 45 mph (72 km/h).
Overtake Acceleration is intended as an aid when passing a vehicle ahead of you. When the turn signal is engaged, Traffic-Aware Cruise Control continues to maintain distance from the vehicle ahead, but allows you to drive slightly closer than your selected distance.
Acceleration cancels when one of the conditions happen:
- You reach your set cruising speed.
- Changing lanes takes too long.
Model S gets too close to the vehicle ahead.
- You disengage the turn signal.
Canceling and Resuming
To manually cancel Traffic-Aware Cruise Control, press the right scroll wheel or press the brake pedal.
- You press the brake pedal.
- Your driving speed exceeds the maximum cruising speed of 90 mph (150 km/h).
- You shift Model S.
- A door is opened.
- The view from the radar sensor or camera(s) is obstructed. This could be caused by dirt, mud, ice, snow, fog, etc.
- The traction control setting is manually disabled or is repeatedly engaging to prevent wheels from slipping.
- The wheels are spinning while at a standstill.
- The Traffic-Aware Cruise Control system is failing or requires service.
When Traffic-Aware Cruise Control is unavailable or cancels, Model S no longer drives consistently at a set speed and no longer maintains a specified distance from the vehicle ahead.
Summary of Cruise Indicators
Traffic-Aware Cruise Control is particularly unlikely to operate as intended in the following types of situations:
- The road has sharp curves.
- Visibility is poor (due to heavy rain, snow, fog, etc.).
- Bright light (such as from oncoming headlights or direct sunlight) is interfering with the view of the camera(s).
- The radar sensor is obstructed (dirty, covered, etc.).
- The windshield is obstructing the view of the camera(s) (fogged over, dirty, covered by a sticker, etc.).