Precautions When Driving with Adaptive Cruise Control

In certain driving situations, ACC may have difficulty detecting vehicles. In these cases, ACC may brake late or unexpectedly. The driver must remain alert and may need to intervene. Examples of these situations are shown below:

Towing a Trailer

Towing a trailer is not recommended when using ACC.

Offset Driving

ACC may not detect a vehicle in the same lane that is offset from your direct path of travel, or a vehicle entering from an adjacent lane. There may be insufficient distance to the vehicle ahead. An offset vehicle may move in and out of the travel lane, which may cause your vehicle to brake or accelerate unexpectedly.

Example of Offset Driving Conditions

Curves and Bends

When driving through a curve with Adaptive Cruise Control on, the system may reduce vehicle speed and acceleration for stability reasons, even if no vehicle is detected. Once the vehicle exits the curve, the system will resume the previously set speed. This is part of normal ACC system operation.

NOTE:

On sharp curves, ACC performance may be limited.

Example of a Curve or Bend

Using Adaptive Cruise Control on Hills

ACC performance may be limited while driving on hills. ACC may not detect a vehicle in your lane depending on speed, vehicle load, driving conditions, and the steepness of the hill.

Example of ACC on a Hill

Lane Changes

ACC may not detect a vehicle until it is fully in the lane in which you are traveling. In the lane change example below, ACC has not yet detected the vehicle changing lanes, and it may not detect the vehicle until it is too late for the ACC system to respond. ACC may not detect a vehicle until it has fully entered the lane. There may not be enough distance to a vehicle changing lanes. Always remain attentive and be ready to apply the brakes if necessary.

Example of a Lane Change

Narrow Vehicles

Some narrow vehicles, such as motorcycles, moving near the outer edges of the lane or entering the lane, are not detected until they have moved into the center of the lane. There may be insufficient distance to the vehicle ahead.

Example of a narrow vehicle

Stationary Objects and Vehicles

ACC does not respond to stationary objects and stopped vehicles. For example, ACC will not respond in situations where a vehicle in front of you exits your lane and the vehicle ahead has stopped in your lane. Always stay alert and be ready to apply the brakes if necessary.

Example of a stationary object and a stopped vehicle