One out of six drivers in a recent test on driver distractions missed a turn due to distractions caused by telematics. Some don't answer the phone. Others ignore the Internet or can't remember what they read. Those are the early results from the federal government's first attempt to measure how drivers deal with a potential information overload from an array of high-tech features being installed in automobiles such as onboard navigation systems and cell phones. The study, expected to be formally released late this summer, is sponsored by the U.S. Department of Transportation's Intelligent Vehicle Initiative, which promotes in-vehicle devices that can warn drivers of dangerous situations, recommend actions or even assume partial control to avoid accidents. Automakers are launching their own investigations. General Motors Corp last fall announced a three-year, $10 million study of driver interaction with cell phones and other devices. This month Ford Motor Co. announced its own $10 million effort and said it had just completed its own simulator. Many states are concerned about cell phones in particular. Eleven now ask patrol officers to determine if the phones were factors in traffic accidents. Thirty-seven states have considered curbs on cell phones in moving vehicles since 1995. So far only minor restrictions have been adopted by California, Florida and Massachusetts.