Automatic braking systems, a relatively new safety feature in some vehicles and a critical part of autonomous cars of the future, are facing complaints from drivers who say some are activating for no apparent reason.
U.S. safety investigators recently started looking at complaints from 2014 model year Jeep Grand Cherokees drivers who said their automatic brakes deployed even though there was no evidence of danger. That follows a May recall by Honda Motor Co. for 2014 and 2015 Acura sport-utility vehicles that could unexpectedly brake hard if they were driving next to an iron fence while a car in front of them simultaneously accelerates.
