ReadWriteDrive is an ongoing series covering the future of transportation. Here’s something gruesome to consider: More than 200 people are killed every year when cars are reversing—most of these deaths are children. Back-up accidents also injure more than 15,000 people each year. These factoids get more tragic when you consider that it’s usually a parent behind the wheel, and the cost of preventing nearly all of these accidents is a cheap piece of technology: A $50 camera. Take heart.