* Vehicle-to-vehicle communication aims to prevent collisions * GPS and WLAN offer effective way to observe surrounding trafficRĂĽsselsheim/Dudenhofen. Preventing accidents by warning drivers about potential danger from other vehicles was a major goal during the development of the new General Motors V2V (vehicle-to-vehicle) communication systems. Vehicles equipped with this technology can communicate with each other and exchange information such as location and speed. Drivers can then be warned in advance if another car is traveling in their blind spot, stopped in an area that is difficult or impossible to see, or about to enter the same intersection as they are. GM engineers demonstrated the current status of V2V development with Cadillac, Saab, Opel and Chevrolet cars at the Dudenhofen Test Center in Germany.
Blind Spot / Lane Change -- The lane change assistant alerts the driver to vehicles traveling in the car’s blind spot, or overtaking. A visual signal warns the driver if another vehicle is traveling in an area that is not visible in the side-view mirror. A light emitting diode (LED) in the A-pillar or side mirror is activated on the relevant side of the car. If the driver then signals his intent to change lanes by activating the indicator in this direction, the LED blinks and the driver’s seat vibrates on that side. “Driving is a very complex task. Knowing where the other guy is and where he’s headed can be as critical as being in control of your own vehicle,” said Hans-Georg Frischkorn, Executive Director, Global Electrical Systems, Controls and Software. “With V2V technology, we intensify the driver’s awareness of his environment to improve road safety, without any distraction to him and certainly without reducing his level of control. This sixth sense lets drivers know what’s going on around them to help avoid accidents and improve traffic flow.”
For these systems, GM uses proven, reliable components that are part of everyday life. The hardware consists of a microprocessor, GPS receivers (Global Positioning System) and Wireless LAN modules. The vehicles establish communication within a few hundred meters of one another and exchange information such as location, speed, acceleration and direction of travel.
Today, vehicles can be equipped with multiple safety sensors, including radar-based sensors connected with speed control devices, lane change assistance systems or sensors to detect objects in a car’s blind spot. GM can increase the operating range and coverage of individual sensors significantly with its comprehensive technology - a more effective and affordable way to provide extensive observation and assessment of the surrounding traffic conditions
Emergency Braking Warning System -- System warns driver when a vehicle ahead brakes hard or makes an emergency stop. The drivers of the cars behind are promptly informed of this dangerous situation by a visual warning symbol on their displays, and an audio advisory, enabling them to adjust their speed accordingly
Demonstration with typical driving situations
GM engineers demonstrated the new technology’s advantages with a range of practical exercises. A warning system minimizes the danger of a driver overlooking another vehicle in their car’s blind spot. Several functions help prevent the rear-end collisions that occur on a daily basis due to poor visibility, twisty roads or short lapses in driver concentration. The system warns of a stationary vehicle on the road even before the driver behind can see it, for example around a corner, or alerts the following traffic of a car making an emergency stop. When a car registers that it is in danger of being rear-ended, it flashes its tail lights rapidly. Warnings inside the approaching car also alert its driver, who then still has enough time to perform a braking or avoidance maneuver. Depending on the situation, the system transmits these warnings visually, acoustically or through vibrations in the driver’s seat.
Forward Collision Warning -- If an approaching car is likely to be involved in a rear-end collision, it warns its driver with an acoustic signal and vibrating driver’s seat. As the approaching car gets closer, the tail lights of the very slow or stationary vehicle ahead also flash rapidly. At this point, the driver still has enough time to react.
In another scenario, a collision warning system improves safety while approaching intersections. Even if there is no visual contact between the drivers of two cars, the system detects any collision danger in advance and alerts both drivers if they need to intervene, for example by braking. Work zones or emergency vehicles can also transmit signals to drivers if a lane is closed or a path needs to be cleared.
Emergency Vehicle Warning -- When drivers hear a siren, it is often difficult for them to tell which direction an emergency vehicle is coming from and how best to clear a path for it. With the help of V2V technology, drivers are informed about the emergency vehicle’s location, distance and direction of travel.
Goal: Wide availability for as many vehicles as possible
GM has deliberately based this technology on inexpensive, proven components, giving it the potential to become standard equipment in many vehicles. The alternative would be to offer extremely expensive high-tech systems for just a few cars, but as Hans-Georg Frischkorn says: “GM has always been committed to democratizing innovations. Our V2V systems are affordable and could potentially be used in every vehicle class. That’s especially important because cooperative systems like these become more effective when many vehicles are equipped with them.”
Source: GME Technology
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