By Sara Dayley

St. Louis (KSDK) -- Every year, more than a hundred children nationwide are killed by people backing up in their cars. Now, there's technology, that if mandated, could help prevent those tragedies. The National Transportation Safety Board says rear-view cameras could save about 100 lives every year.

Depending on the size of the driver, and the type of car, a blind zone can range from 23 to 50 feet. To put it in perspective with how big that space is, a blind zone is big enough to fit 62 children.

Rear-view cameras can help you see what you can't see behind you, however, they are not required in all vehicles and that's what the NTSB wants to change. 

NewsChannel 5 had some kids at St. Louis Children's Hospital help us illustrate just how large of a space a blind zone truly can and agreeing with the mandate.

Dr. Diane Kraus from Children's Hospital said, "Something is better than nothing."

Since cameras are not required in all vehicles just yet, there are some simple steps you can take to avoid a tragic accident.

• Walk all the way around your vehicle before driving off
• Know exactly where your kids are - don't assume
• Teach children "parked" vehicles can move
• Teach children that any space around a car is the "no play" zone
• Toys and other sports equipment should be played with off the driveway
• Know the size of your blind zone area

As it turns out, It's not the cost to the auto industry that is holding back this rule, but it's the technical issue of how long it would take for the camera to pop up on the screen. Federal regulators want the camera to be on the screen in one second, leaving no time for the car to move. Car manufacturers want three seconds to give the complex system they're designing time to boot up. Both sides have voiced their opinion and a decision is expected to come down towards the end of the year.