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UN Decade of Action
for Road Safety
Driver assistance systems
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Function
Driver assistance systems enable safe, relaxed driving
Based on intelligent sensor technology, driver assistance systems constantly monitor the vehicle surroundings as well as the driving behaviour to detect potentially dangerous situations at an early stage. In critical driving situations, these systems warn and actively support the driver and, if necessary, intervene automatically in an effort to avoid a collision or to mitigate the consequences of the accident.
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Customer benefits
- Improved safety for occupants and other road users
- Avoidance of accidents, mitigation of the severity of accidents
- New safety functions by means of networking existing systems and components
- Modular safety systems
- Synergies due to expertise in system development and networking
Driver Drowsiness Detection
Monotonous driving, e.g. on expressways, is exhausting and quickly leads to loss of concentration. Based on steering-angle data, the function Driver Drowsiness Detection continuously analyzes the steering behaviour of the driver to identify phases during which the driver does not steer for a brief period and then makes an abrupt correction – often a sign of failing concentration and arising tiredness. The function combines the frequency and strength of these reactions with other data such as vehicle speed, time of day and use of other indicators to calculate a tiredness index. If this index exceeds a specific value, a visual and/or audible signal can warn the driver of becoming tired reminding her/him of the danger of nodding off at the wheel.
As well as warning the driver, data concerning the tiredness of the driver can be used by other systems in the vehicle. In combination with a navigation system, for example, it is possible to display the next available opportunity to stop or take a rest break.
Predictive Emergency Braking System
A brief distraction or loss of concentration can often be sufficient to cause a rear-end collision. A driver traveling at 80 km/h (50 mph) who is distracted for just one second covers a distance of over 22 meters (24 yards) in this time. In critical situations, seconds are decisive in determining whether the driver can avoid a rear-end collision.
Accident research shows that prior to rear-end crashes most drivers do not apply the brake pedal strongly enough, or do not apply the brakes at all. That is why Bosch has developed the Predictive Emergency Braking System. It assists in avoiding rear-end collisions and mitigating the consequences. The system, which is based on the networking of a radar sensor with the Electronic Stability Program (ESP®) or Electronic Stability Control (ESC), continuously analyzes the traffic ahead.
The Predictive Emergency Braking System becomes active as soon as the vehicle is started, and supports the driver at all speeds — both by day and by night. Nevertheless, the driver still has a responsibility to pay attention and drive carefully at all times.
Component
Lane Assist Systems
A brief distraction or loss of concentration can often be enough to cause the driver to leave the lane unintentionally. This can lead to serious crashes.
Lane Departure Warning and Lane Keeping Support from Bosch help to counteract unintentional drift out of the marked lane. They can be enabled from speeds of 60 kph or 40 mph upwards. Both functions make use of a video camera to detect lane markings ahead of the vehicle by analysing differences in contrast between the road surface and the lane markings. Lane Departure Warning and Lane Keeping Support can identify up to four lanes. Even when one side of the lane marking momentarily disappears the functions remain enabled.
