New signs are designed to warn drivers if they see a child in the back seat of a car . The National Highway Traffic Safety Administration says they are ` ` inconsistent and unreliable '' Heat stroke is the leading cause of non - crash vehicle deaths for children under the age of 14 .
New devices are meant to alert adults if they leave a child in the back seat of a car . The National Highway Traffic Safety Administration says they are `` inconsistent and unreliable '' Heat stroke is the leading cause of non-crash vehicle deaths for children under the age of 14 .