If you have children you know that your biggest concern - that gnawing ache in the back of your mind - is for their safety. When they reach driving age, that concern grows exponentially, because many teens will find themselves involved in traffic accidents before they reach their 20s. With this in mind we at KBB.com have gone over our considerable data bank, combed the files of the National Highway Traffic Safety Administration (NHTSA) and the Insurance Institute for Highway Safety (IIHS), and relied on our deep knowledge of affordable automobiles to choose these 10 Safe New Cars for Teens.