Cost-effective driver drowsiness detection

Bosch has revealed that its driver drowsiness detection system, first introduced as a standard feature in 2010, in the new Volkswagen Passat is being fitted to the new Passat Alltrack. Fatigue and microsleep at the wheel are often the cause of serious accidents. However, the initial signs of fatigue can be detected before a critical situation arises, and the Bosch system can do this by monitoring steering movements and advising drivers to take a break in time. The required information is provided either by
May 2, 2012 Read time: 3 mins
311 Bosch has revealed that its driver drowsiness detection system, first introduced as a standard feature in 2010, in the new 994 Volkswagen Passat is being fitted to the new Passat Alltrack.

Fatigue and microsleep at the wheel are often the cause of serious accidents. However, the initial signs of fatigue can be detected before a critical situation arises, and the Bosch system can do this by monitoring steering movements and advising drivers to take a break in time. The required information is provided either by the car’s electric power steering system, or by the steering angle sensor, which is part of the car's ESP anti-skid system. Bosch says that the feature can therefore be installed cost-effectively and helps further increase road safety.

The influence of fatigue on accidents has been demonstrated in a number of studies. In 2010, the 1765 American Automobile Association (AAA) published an analysis based on the accident data collected by the 834 National Highway Traffic Safety Administration (NHTSA) in the United States. The assessment showed that overtired drivers were at the wheel in 17 per cent of all fatal accidents in the US.

Fading concentration and fatigue compromise the driver’s steering behaviour and response time. Fine motor skills deteriorate, and steering behaviour becomes less precise. The driver corrects small steering mistakes more often. The new driver drowsiness detection function is based on an algorithm which begins recording the driver’s steering behaviour the moment the trip begins. It then recognises changes over the course of long trips, and thus also the driver's level of fatigue. Typical signs of waning concentration are phases during which the driver is barely steering, combined with slight, yet quick and abrupt steering movements to keep the car on track. Based on the frequency of these movements and other parameters, among them the length of a trip, use of turn signals, and the time of day, the function calculates the driver's level of fatigue. If that level exceeds a certain value, an icon such as a coffee cup flashes on the instrument panel to warn drivers that they need a rest. The Bosch Driver Drowsiness
Detection function addresses an important aspect of the driver's condition, and can thus contribute to improving road safety.

Related Content

  • Speed reduction measures - carrot or stick?
    January 23, 2012
    In Sweden, marketing company DDB Stockholm employed a mock speed camera as part of a promotional campaign for automotive manufacturer Volkswagen. The result was worldwide online interest and promotion of the debate over excessive speed to the national level. A developing trend in traffic management policy is to look at how to induce road users to modify their behaviour by incentivising change rather than forcing it through the application of penalties. There have been several studies conducted into this; an
    Read More
  • Idaho adds human dimension to winter savings
    September 23, 2014
    Idaho leverages the increased capability and reliability of its road weather sensor network to reduce costs and prevent accidents. Weather-related accidents can form a significant chunk of an authorities’ annual road casualty statistics. While authorities cannot control the weather, the technology exists to monitor the road conditions and react with warnings to motorists and the treatment of icy or snow-covered roads. However, with all capital expenditure now placed under the microscope of public scrutiny,
    Read More
  • Healthy prospects for floating vehicle data systems
    February 3, 2012
    Elmar Brockfeld, Alexander Sohr and Peter Wagner from the German Aerospace Center's Institute of Transport Systems look at the prospects for floating vehicle data systems. Although Floating Vehicle Data (FVD) or probe vehicle fleets have been around for about a decade, the idea behind them is of course much older: from probe vehicles that flow with the traffic it should be possible to get a precise, fast and spatially near-complete picture of the prevailing traffic flow conditions in an area under surveilla
    Read More
  • Cooperative road infrastructures - progress and the future
    February 1, 2012
    Robert Bertini, deputy administrator of the USDOT's Research and Innovative Technology Administration, discusses the research and deployment paths of cooperative road infrastructures. High-level analysis by the US's National Highway Traffic Safety Administration (NHTSA) of the potential of Vehicle-to-Infrastructure/Infrastructure-to-Vehicle (V2I/I2V) and Vehicle-to-Vehicle (V2V) technologies indicates that V2V could in exclusivity address a large proportion of crashes involving unimpaired drivers. In fact,
    Read More

Highlighted Content