NHTSA Complaint #11429742 — 2015 FORD F-150

a)When using the adaptive cruise control on interstate, the cruise control periodically resets to a much lower speed for no apparent reason. I have had the cruise set to seventy-five miles per hour on interstate highways and suddenly the cruise resets to thirty-five or forty-five miles per hour. This could become somewhat dangerous if someone is following me and does not notice the sudden reduction in speed. b)I have encountered problems when using the combined systems. For example, in a long line of vehicles approaching a stop sign, the autonomous systems operated efficiently. When the vehicle immediately in front of me leaves the stop sign, my vehicle attempts to accelerate through the stop sign. c)The lane keeping seems to pull hard to the right at various times. It may be due to the striping at interstate highway exits where to right hand lane marking follows the exit and the vehicle seems to attempt to remain centered between the lane markings. The lane keeping feature is very tiring to operate. The system seems to require operator intervention every minute of two so that the system may assure operator vigilance. This continued need to move the steering wheel slightly is extremely tiring. d)Speed sign recognition identifies school zone speed signs and reduces the preset speed of the vehicle even when the school zone is not active, such as off hours or holidays. This could become somewhat dangerous if someone is following does not notice the sudden reduction in my speed. e)Law requires the vehicle to be at the reduced / posted speed immediately upon passing the sign. Since the vehicle requires a few feet to recognize the change in speed limit and slow down, a traffic ticket may result. This has been reported to Ford and as a result the local dealer aligned the cameras with no resulting change in performance.