View By Application

Crash Prevention & Safety > Collision Avoidance > Lane Departure Warning


Lane departure warning systems warn drivers that their vehicle is unintentionally drifting out of the lane.


Blind spot warning technology contributes to a 23 percent reduction in lane change injury crashes.(7/26/2019)

Driver Assistance vehicle technologies have potential to prevent 1.6 million crashes per year.(02/01/2019)

Crash statistics show that lane departure warning systems have reduced all relevant crashes by 11 percent, and all relevant injury crashes by 21 percent, controlling for driver demographics.(August 2017)

Widely deployed in-vehicle Advanced Driver Assistance Systems (ADAS) have potential to reduce crash rates by 47 percent.(June 2017)

Deployment of blind spot monitoring, lane departure warning, and forward collision warning systems on all light-duty vehicles in the U.S. could provide an annual safety benefit of $18 billion to $202 billion annually.(10/01/2016)

Advanced Collision Avoidance Technologies (ACATs) range in effectiveness from 7 to 74 percent.(01/01/2014)

Casualty benefits from advanced emergency braking systems in passenger vehicles have potential benefit-to-cost ratios ranging from 0.07 to 2.78.(November 2011)

Drivers recommend use of Integrated Vehicle-Based Safety Systems, but price remains a factor. (June 2011)

In Michigan, 108 volunteers who drove 16 vehicles equipped with crash warning systems indicated the blind-spot detection component of the lane-change/merge crash warning system was the most useful and satisfying aspect of the integrated system. (June 2011)

Integrated Vehicle-Based Safety System use results in 48 percent reduction in lane departure rate for light vehicles, with similar trend for heavy trucks.(June 2011)

In Michigan, 8 of 108 volunteers who drove light vehicles equipped with an integrated crash warning system indicated the system prevented them from having a crash.(June 2011)

Active and passive in-vehicle safety technologies are expected to decrease fatalities up to 16 percent.(April 2011)

A benefit-cost analysis of Lane Departure Warning System for the trucking industry found benefits per dollar spent values of $1.37 to $6.55 with varying estimates of efficiency and annual VMT.(February 2009)

Forward collision warning systems have potential to prevent 23.8 percent of crashes involving large trucks.(2009)

In the Netherlands, a five month field operational test (FOT) of 20 cars equipped with lane departure warning (LDW) systems found that the number of unintentional lane crossings decreased by 35 percent on secondary roads and 30 percent on highways due to the use of LDW.(9-13 October 2007)

A Side Object Detection System (SODS) for transit buses was cost-effective with a baseline benefit-cost ratio of 1.43 and a ratio range of 0.37-3.55.(August 2007)

Widespread deployment of integrated countermeasure systems could prevent over 48 percent of rear-end, run-off-road, and lane change crashes.(August 2005)

Survey data collected from tractor trailer drivers with one to three years of experience driving with intelligent vehicle safety systems (IVSS) indicate that IVSS lowers their perceived workload by 14 to 21 percent over a range of driving conditions.(28 October 2004)

A 1999 FHWA study suggested that lane departure warning systems have the potential to reduce road departure crashes by 10 percent for passenger vehicles and 30 percent for heavy trucks.(December 1999)

In-vehicle computer visioning technology designed to detect and warn truck drivers of lane departure and driver drowsiness reduced fuel consumption by 15 percent, increased safety, and provided drivers with more comfortable working conditions.(20 July 1999)

Equipping all light-duty vehicles with blind spot monitoring, lane departure warning, and forward collision warning expected to cost $13 billion.(10/01/2016)

Lane departure warning (LDW) systems sold in the United Kingdom ranged in price from $457 to $750 per vehicle (2009).(November 2011)

An industry analysis found the cost of Lane Departure Warning Systems for large trucks ranged from $765 to $866 per vehicle.(February 2009)

Collision Avoidance Systems for transit buses ranged from $900 for a Lane Departure Warning System to $2,550 for a Side Object Detection System(August 2007)

Various safety- and driver assistance-related systems such as blind spot monitoring, route guidance, adaptive cruise control, automatic collision notification, and lane departure warning are available for purchase as an individual option or a bundled-options package at costs that vary widely.(February 2006)