A final rule Monday by the US Department of Transportation will require all vehicles under 10,000 pounds to have rearview cameras by May 2018 in order to mitigate the damages caused by backup accidents. The mandate comes after years of delaying the regulatory review, which was supposed to be completed by 2011.

The standard was originally signed into law by President George W. Bush in 2008 to go into effect by the end of 2011. The regulatory review was delayed in February 2012 until the end of 2012 and then delayed again indefinitely.

According to ABC News, 50 children were backed over by a vehicle every week around the time of reporting, and one or two of those were killed. According to the National Highway Traffic Safety Administration (NHTSA), 210 people die annually from getting backed over.

The field of view of the rearview cameras must cover an area of 10 feet by 20 feet, and there will be spec requirements including "image size, linger time, response time, durability, and deactivation." The NHTSA estimates that the monetary benefit of the ruling will be between $265 and $396 million, thanks to both avoided fatalities and property damage.