Lane Departure Warning 

What is a lane departure warning system?

What is a lane departure warning system?

A lane departure warning (LDW) system is an advanced safety technology that alerts drivers when they unintentionally drift out of their lanes without a turn signal. It’s important to note that LDW systems do not take full control of the vehicle or keep the driver from operating it.
How does it work?

How does it work?

LDW systems use a camera to monitor lane markings and detect when a vehicle is drifting out of its lane of traffic. When it detects that a vehicle is veering out of its lane, an audio, visual, or other alert warns the driver of the unintentional lane shifts so the driver can steer the vehicle back into its lane.
What types of crashes does it prevent?

What types of crashes does it prevent?

LDW systems provide a valuable safety benefit, and can help keep you and your passengers safe from crashes such as:
  • Striking a car in an adjoining lane, which could either involve “sideswiping” a vehicle traveling in the same direction or hitting a vehicle traveling in the opposite direction; and
  • A rollover, which often occurs when a vehicle leaves the road.
Does NHTSA recommend?

Does NHTSA recommend lane departure warning systems?

Yes. LDW systems meet NHTSA’s performance specifications, and we recommend you look for this technology when shopping for a vehicle.
What is the current state of this technology?

What is the current state of this technology?

Today, LDW systems are an option on many new cars, SUVs, and trucks. To find out if LDW is available in the vehicle you’re interested in buying, visit NHTSA’s 5-Star Safety Ratings and search for 2011 vehicles and newer.
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