I cannot imagine what the parents of yet another toddler run over in his driveway must be feeling. I have always though that these sorts of accidents are amongst the most tragic and most horrible. I once had to attempt to resuscitate a toddler in the middle of a car park. The distraught mother had backed over her own child, unaware that he had slipped out of the car while she was trying to straighten it up in the parking space. She had unbuckled him from his car seat and turned to grab her purse before deciding to straighten the car. The 2-year-old did not survive ( not through lack of trying – I had a full resuscitation kit in the back of my car at the time.)
The real tragedy, however, is that the vast majority of these accidents could be avoided with a fairly cheap sensor installed into the rear of all vehicles. The sidebar in the HoS article cited puts the cost of retrofitting such as sensor as $400. That is a reasonably steep sum of money for most people. However, the cost of making these a standard feature of new vehicles is of the order of $50/car. Even the cheapest car should have one. There is no excuse for any manufacturer to skimp on such a device and no new car should be allowed to come to market without one.
On average four kids are killed on driveways every year. One is too many.