DailyTech - Toyota is in the process of developing a system designed so that cars would be able to detect drunken drivers and automatically shut down. According to reports, the world's current No. 2 automaker plans on fitting some cars with the system by the end of 2009. The detection system will be released as an optional extra. Toyota hopes that it can be installed on all car models once manufacturing prices have dropped. New cars equipped in the system will not start if driving wheel sweat sensors pick up a high level of alcohol in the driver's bloodstream. The Toyota system will also be able to detect if a driver is driving abnormally, along with a camera that is used to determine whether or not the driver has pupils that are dilated -- a sign that the driver may have had too much to drink. If the system picks up any of the signals, the car will slow down and come to a complete stop.