Your teen gets behind the wheel. It's one of the first times it really hits you: you can't always be there to protect your child or can you? A number of new tracking devices let you keep tabs on whether he/she's gunning the engine, slamming on the brakes, even headed to a forbidden part of town! From computerized car chips to GPS devices, even mounted cameras, a Heads Up! on how to tag along with your traveling teen.