The Insurance Institute of Highway Safety is an independent organization that provides detailed safety ratings on how well vehicles protect occupants. The institute provides overall crash ratings on a clear scale, as well as ratings for impacts on specific areas. There are also some great statistics from the Highway Loss Data Institute separated by topic.
Take a look and see how well your current vehicle or a vehicle you are considering buying performed.
Another useful vehicle safety site worth a look is www.safercar.gov This official government site also has ratings along with safety advice.