Road Departure Mitigation System

Alerts and helps assist you when the system detects a possibility of your vehicle crossing over detected lane markings, or approaching the outer edge of the pavement (into grass or gravel border) or a detected oncoming vehicle.

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Important Safety Reminder
Like all assistance systems, the Road Departure Mitigation system has limitations.
Overreliance on the Road Departure Mitigation system may result in a collision. It is always your responsibility to keep the vehicle within your driving lane.

The Road Departure Mitigation system alerts you when the system detects that you are approaching the outer edge of the pavement (into grass or gravel border), an oncoming vehicle, or drifting into another lane without using a turn signal.
The Road Departure Mitigation system may not detect all lane markings or every instance of lane drift.
The Road Departure Mitigation system may not detect that you are approaching the outer edge of the pavement (bordered by grass or gravel) or an oncoming vehicle.
The Road Departure Mitigation system may not be able to assist you depending on weather, speed or road conditions.

You can read about handling information for the camera equipped with this system.

The Road Departure Mitigation system may not work properly or may work improperly under the certain conditions:

There are times when you may not notice the Road Departure Mitigation system functions due to your operation of the vehicle, or road surface conditions.

You can change the settings for the Road Departure Mitigation system.
If LKAS is off, the message below may appear if the system has determined that there is a possibility of your vehicle crossing over detected lane markings, the outer edge of the pavement (into a grass or gravel border) or oncoming vehicle.

How the System Works

The front sensor camera behind the rearview mirror monitors left and right lane markings in white or yellow, the outer edge of the pavement (bordered by grass or gravel) or a detected oncoming vehicles.
If your vehicle approaches any detected lane markings, the outer edge of the pavement (bordered by grass or gravel) or a detected oncoming vehicles when the turn signals have not been engaged, the system activates.

  • If the system cannot detect lane markings (in white or yellow), no assistance will be provided to avoid approaching oncoming vehicles. In addition to a visual alert, the system assists with steering and alerts you with rapid steering wheel vibrations to help you remain within the detected lane.

As a visual alert, the Lane departure message appears on the driver information interface.

The system cancels assisting operations when you turn the steering wheel to avoid crossing over detected lane markings or approaching the outer edge of the pavement (into grass or gravel border) or an oncoming vehicle.

If the system operates several times without detecting driver response, the system beeps to alert you.

How the System Activates

The system activates when all of the following conditions are met:

  • The vehicle is traveling between about 45 and 90 mph (72 and 145 km/h).
  • The vehicle is on a straight or slightly curved road.
  • The turn signals are off.
  • The system makes a determination that the driver is not actively accelerating, braking, or steering.
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The Road Departure Mitigation system may automatically shut off and the safety support indicator (amber) comes and stays on.

The Road Departure Mitigation system function can be impacted when the vehicle is:
  • Driven on the inside edge of a curve, or outside of a lane.
  • Driven in a narrow lane.

Road Departure Mitigation system On and Off

You can turn the system on and off using the driver information interface.

The Road Departure Mitigation system is in the previously selected on or off setting each time you turn the power system on.

Detail
When you have selected Warning Only, the system does not operate the steering wheel.

The Vehicle Stability AssistTM (VSA®) system, Adaptive Cruise Control (ACC) with Low Speed Follow, safety support, low tire pressure/TPMS*, and parking brake and brake system (amber) indicators may come on in amber along with a message in the gauge when you set the power mode to ON after reconnecting the 12-volt battery.
Drive a short distance at more than 12 mph (20 km/h).
Each indicator should go off. If any do not, have your vehicle checked by a dealer.

Road Departure Mitigation system Conditions and Limitations

The system may not properly detect lane markings (in white or yellow), the outer edge of the pavement (into grass or gravel border) or an oncoming vehicle under certain conditions. Some examples of these conditions are listed below.

Environmental conditions

  • There is little contrast between lane lines and the roadway surface.
  • Driving in bad weather (rain, fog, snow, etc.).
  • Driving on a snowy or wet roadway.
  • Driving into low sunlight (e.g., at dawn or dusk).
  • Shadows of adjacent objects (trees, buildings, guard rails, vehicles, etc.) are parallel to white (or yellow) lines.
  • Sudden changes between light and dark, such as the entrance or exit of a tunnel or the shadows of trees, buildings, etc.
  • Strong light is reflected onto the roadway.
  • Driving at night or in a dark place such as a tunnel (due to low-light conditions, lane lines, the road surface, or oncoming vehicles may not be illuminated).
  • The distance between your vehicle and the vehicle ahead of you is too short, and lane lines and the road surface are not visible.
  • The outer edge of the road is bordered by objects, materials, etc. other than grass or gravel.

Roadway conditions

  • Driving on a road with temporary lane markings.
  • Faint, multiple, or varied lane markings are visible on the roadway due to road repairs or old lane markings.
  • The roadway has merging, split, or crossing lines, such as at an intersection or crosswalk.
  • The lane markings are extremely narrow, wide, or changing.
  • Part of the lane markings are hidden by an object, such as a vehicle.
  • The road is hilly or the vehicle is approaching the crest of a hill.
  • Your vehicle is strongly shaken on uneven road surfaces.
  • When objects on the road (curb, guard rail, pylons, etc.) are recognized as white (or yellow) lines.
  • Driving on rough or unpaved roads, or over bumpy surfaces.
  • Driving on roads with double lane lines.
  • Driving on snowy or slippery roads.
  • Passing through an exit or an intersection.
  • The pavement is only partially visible due to snow or puddles on the road.
  • Driving on unpaved or rutted roads.
  • White (or yellow) lines are not recognized correctly due to road conditions such as curves, twists, or hills.

Vehicle conditions

  • When lighting is weak due to dirt covering the headlight lenses, or there is poor visibility in a dark place due to the headlights being improperly adjusted.
  • The front of the camera is covered by dirt, fog, rain, mud, wet snow, seals, accessories, stickers, or film on the windshield.
  • Driving at night or in a dark place (e.g., a tunnel) with the headlights off.
  • When the driver operates the brake pedal and steering wheel.
  • There is residue on the windshield from the windshield wipers.
  • An abnormal tire or wheel condition (incorrect sizes, varied sizes or construction, improperly inflated, etc.).
  • The vehicle is tilted due to heavy load in the trunk or rear seats.
  • Tire chains* are installed.
  • The suspension has been modified.

Examples of limitations on detection due to the condition of oncoming vehicles

  • The oncoming vehicle or vehicle ahead of you is sideways.
  • The oncoming vehicle jumps out in front of you.
  • When the oncoming vehicle blends in with the background, preventing the system from recognizing it.
  • The headlights of an oncoming vehicle are lit on one side or not lit on either side in a dark place.
  • The distance between your vehicle and the oncoming vehicle is too short.
  • Part of the oncoming vehicle is not visible due to the vehicle ahead of you.
  • There are multiple oncoming lanes or turning lanes.
  • The vehicle in the adjacent lane is parked or moving at an extremely slow speed.

Examples of other limitations on detection or system operation

  • When the oncoming vehicle is specially-shaped.
  • When the camera cannot correctly identify the shape of the oncoming vehicle.

With Little Chance of a Collision

The Road Departure Mitigation system may activate in the below conditions.

  • When driving through curves, your vehicle comes to a point where an oncoming vehicle is right in front of you.

* Not available on all models

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