A fading push for national regulations governing driving and cellphone use means auto makers are adding more new technologies to their vehicles, and customers love the electronics. Kia Motors’ Michael Sprague said, “Consumers are going to continue to drive with phones and all we can do as a manufacturer is to provide what the consumers are asking for and make it as safe as possible.” The NHTSA plans to issue results of a study on cognitive distraction caused by the new technologies later this year.