The European Commission has reserved part of the radio spectrum for smart vehicle communication systems. The new systems will allow cars to communication with each other wirelessly. Within the next six months, the 300MHz of the spectrum in the 5.9GHz frequency band will be allocated by the national authorities.
The intent of the new plan is to curb road accidents and alleviate traffic jams. Smart vehicle communication systems have the potential to make safer and ease the lives of Europe’s drivers. In 2006, more than 42,000 people died in road accidents in the European Union and more than 1.6 million people were injured. The European Commission also has plans to encourage investment in smart vehicle communication systems by the private sector.
Another great article on this topic can be found at http://thefutureofthings.com/news/1280/cars-that-talk.html. The article appears to be quite old, but very informative.