Gregor Stipicic writes: " Cars that drive themselves — even parking at their destination — could be ready for sale within a decade, General Motors Corp. executives say. "This is not science fiction," Larry Burns, GM's vice president for research and development, said in a recent interview. GM plans to use an inexpensive computer chip and an antenna to link vehicles equipped with driverless technologies. The first use likely would be on highways; people would have the option to choose a driverless mode while they still would control the vehicle on local streets, Burns said. He said the company plans to test driverless car technology by 2015 and have cars on the road around 2018. "