However, we currently have little information on the extent to which these manufacturers and others are following human factors guidelines and testing their products to confirm that distracted driving is sufficiently limited. NHTSA supports the efforts of manufacturers to limit the distraction potential of the products they sell. To gain a fuller understanding of the state of implementation of human factors guidelines, NHTSA plans to review the extent to which manufacturers are following basic human factors guidelines as well as the current guidelines put forth by the Alliance of Automobile Manufacturers.