"Some of the vehicles that we've measured have huge blind spots behind them, much more than we'd ever thought," Champion said.
The ABC affiliate in Boston, WCVB, ran a similar experiment, demonstrating that not one child, but a whopping 17, were not visible when standing in the blind spot of one vehicle.
High-Tech Fixes on the Market
Safety advocates say one way to prevent such accidents is to get out of your car and look behind it before pulling out, and be aware as you back up that you do have a blind spot.
Automakers may already have the technology to address the rear view blind spot problem. For example, the 2003 Acura MDX provides a fisheye camera that allows drivers to see what is going on behind their vehicles. Currently, the technology is only available in a few high-dollar vehicles.
Cameras or radar-type warning devices are becoming more widely available as options from car makers or from after-market companies. They do cost from a few hundred dollars up to nearly $1,000.
Rep. Peter King, R-N.Y., is planning to introduce legislation this week that would require the government to start keeping track of non-traffic non crash incidents, such as driveway back-over accidents.
The bill would also require auto regulators to evaluate new technologies such as rearview cameras and sensors that may help prevent these accidents.
Since the loss of his son, Gulbransen has installed a rearview camera on his SUV, and has made it his mission to warn parents — and anyone else who will listen — about the dangers of blind spots.
"I'm doing this for Cameron," Gulbransen said. "I'm doing this for all the Camerons that are out there. Just learn from what happened here. It's so devastating, yet it's simple to fix."
To find out more about child safety around cars, go to www.kidsandcars.org