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Next Generation of Cars

Atmospheric Scientists' System Has Cars Talking - Warns Drivers of Potential Road Hazards

November 1, 2009

Atmospheric scientists have designed a system that allows vehicles to communicate with one another in an effort to warn drivers about hazardous conditions well in advance, improving both safety and mobility. Sensors on the vehicles would measure atmospheric conditions such as temperature, pressure and humidity, while an onboard digital memory device records the information. Other indirect signs of road conditions would also be noted, such as windshield wiper activity or activation of the anti-lock braking system. A central database would receive the transmitted information from each car where it can be integrated together with other data on weather and traffic and finally used to update motorists on conditions.

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SLOW DOWN FOR WET WEATHER: About 25% of all car crashes occur in bad weather, and most of those occur when the pavement is wet. Many drivers recognize that snow and ice can cause them to lose control of their cars, but most underestimate the danger that rain can pose. For this reason, more people travel in wet weather, and do not realize the need to adjust to lower speeds when traveling on wet roads. Following cars less closely is also a strategy that provides drivers with more time to react if something dangerous occurs in their path.

WHAT HAPPENS DURING A CRASH? The laws of physics say that an object in motion will stay in motion, with the same speed and direction, unless it is acted upon by an outside force. So if you are traveling at 60 MPH and your car hits a solid wall and comes to an immediate stop, your body will continue going at 60 MPH until it is stopped by, say, a seatbelt, airbag, or, at worst, a windshield. If the car has a rigid body, the rapid deceleration caused by the impact will produce injuries and fatalities. Because the stopping time is only a split second, the force on the passengers is very high.

The Institute of Electrical and Electronics Engineers, Inc.-USA, and American Meteorological Society contributed to the information contained in the TV portion of this report.

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Communicating Cars

To Go Inside This Science:  
Sheldon Drobot
NCAR Program Manager
303-497-2705
drobot@ucar.edu

Institute of Electrical and Electronics Engineers, Inc.
IEEE 
IEEE-USA
Pender McCarter
p.mccarter@ieee.org

American Meteorological Society
Boston, MA 02108-3693


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