It's been nearly three years since we first told you about a new warning system being developed by Mercedes aimed at combating driver fatigue and the occurrence of falling asleep behind the wheel.  Today, the company has announced the technology - officially titled "Attention Assist" - is ready for series production, with the system set to debut on Mercedes models starting in spring 2009.

If you missed our prior coverage of Attention Assist, here again is a quick summary of how the system operates.  To begin, Attention Assist works by first observing a driver's behaviors, and then using this information to create a unique driver profile. During operation, a series of tests continually monitor driver input in relation to this profile, and in the event a deviation is encountered, the system then determines whether or not the deviation is a result of fatigue. If it is, Attention Assist alerts the driver both visually and audibly that it's time to take a break.

Of course, the engineering behind the system is far more complex. To determine a driver's profile, factors taken into account include speed, longitudinal and lateral acceleration, angle of the steering wheel, the way that the indicators and pedals are used, certain driver control actions, and even various external influences such as a side wind or an uneven road surface. During vehicle operations, these factors are then continually monitored, ensuring to a precise degree that erratic driving behavior is in fact a result of fatigue - not merely the byproduct of a passing gust of wind.

The system is just the latest in a long line of accident avoidance technologies already pioneered by Mercedes. The Electronic Stability Program (ESP), PRE-SAFE, PRE-SAFE brake and Brake Assist are just some of the safety systems already utilized in the Mercedes model range.

To learn more about Attention Assist as well as its upcoming debut in spring 2009, you can find more information in the official press release below.

Enjoy.



OFFICIAL PRESS RELEASE


Overtiredness is one of the most frequent accident causes in holiday traffic: Mercedes-Benz to introduce Attention Assist into series production in spring 2009

Stuttgart - Accident researchers at Mercedes-Benz are acutely aware of the danger in nodding off at the wheel (the "one-second nap"). In the view of these specialists, long holiday journeys without intermediate breaks involve a high risk of overtiredness, whose signs drivers often fail to notice in time. For this reason Mercedes-Benz has developed the innovative driver support system Attention Assist. This is able to recognise driver fatigue at an early stage, and warn the driver that a break is called for soon. The system will enter series production in spring 2009.

Scientific studies indicate that around 25 percent of all serious accidents occurring on motorways are caused by overtired drivers. In other words, this accident cause is of even more significance than driving under the influence of alcohol.

During long-distance journeys in the dark, or under unchanging conditions at a constant cruising speed, the risk of the "one-second nap" is greatest because the driver's attention lapses and monotony increases the danger of falling asleep even further. Studies have shown that the reaction times of drivers can be 50 percent longer after only four hours of non-stop driving. The risk of an accident is doubled after this length of time, and after six hours of driving it is no less than eight times as high.

With the newly developed Attention Assist, Mercedes-Benz is continuing its practically-oriented commitment to accident prevention as already demonstrated by e.g. the Electronic Stability Program (ESP®) and Brake Assist, which have already led to a measurable improvement in traffic safety.

Attention Assist monitors the driving behaviour of the driver, generating an individual driver profile which is constantly compared to a flow of sensor data. This continuous monitoring is important, so that the system can recognise the driver's transition from alertness to drowsiness and warn him in good time.

Steering characteristics as the most important indicator of fatigue

In addition to the vehicle speed and linear/lateral acceleration, the Mercedes system also registers e.g. steering wheel movements, indicator and pedal operation, plus a number of specific control operations and external influences such as side winds or uneven road surfaces. Monitoring the driver's steering behaviour has proved to be particularly relevant, as an overtired driver has difficulty in keeping the vehicle precisely on track. He makes minor steering errors which are often quickly corrected in a characteristic manner. Intensive tests by Mercedes engineers involving more than 550 male and female drivers have shown that this effect already commences during an early phase of the onset of fatigue – usually before the highly dangerous "one-second nap".

The heart of the Mercedes system is an extremely sensitive sensor that enables the steering movements and their speed to be monitored very precisely.

During the first few minutes of each journey, Attention Assist uses these data to compile an individual driver behaviour pattern which is constantly compared with the current steering behaviour and driving situation by the onboard electronic control unit. This enables the system to recognise the typical signs of overtiredness and warn the driver accordingly. This is done by an acoustic signal and a display in the instrument cluster with the clear-cut advice: "Attention Assist. Break!"

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