*1 The International Motor Show is held September 13, 2011 through September 15 in Frankfurt, Germany.
*2 Contact Area Information Sensing. "CAIS" is a registered trademark of Bridgestone Corporation.
*3 Dry, semi-dry, wet, slush, fresh snow, compacted snow, ice
*4 The high precision of this road surface determination technology in various environments has been verified through extended testing over two winters on public roads in Japan (Hokkaido) where dangerous conditions like snow and ice are likely to appear. Detailed results of the tests were announced at the 2010 Annual Congress (Spring) of the Society of Automotive Engineers of Japan and at the World Automotive Congress of the International Federation of Automotive Engineering Societies.
*5 A driver of a car equipped with CAIS can share information on potentially dangerous road surface changes with other motorists who may be traveling with them on the same road.
(1) An accelerator sensor located inside the tread of a tire detects vibrations in the tire's tread and wirelessly sends that information to the vehicle's analytical equipment. Moreover, CAIS is powered by Bridgestone's proprietary power generation equipment.
(2) The analytical equipment analyzes the vibrations in real time, and determines which of seven road surface conditions (dry, semi-dry, wet, slush, fresh snow, compacted snow, ice) exist.
(3) The results of the determination of road surface conditions are displayed on a monitor inside the vehicle.