When passing a semi truck on the left (semi is to the right of me) using the adaptive cruise control function, the truck slammed on its brakes and said collision warning. Car behind me almost rear ended me. This happens intermittently like 6 times in 3 months and only happens when passing a large semi and the semi is to my right. Only happens in day time and even then, only sometimes happens.

- Willow Springs, IL, USA

Adaptive cuisse control falsely detects potential collision when passing semitruck (18-wheeler) on interstate/freeway highways as speed of 70mhp. The brakes are automatically applied and collision warning message goes off in the dashboard center screen. This happens very frequently when passing semitruck, to the point that I either disable the cruise or get ready to punch the accelerator in order to prevent a rear-end accident in case someone behind me.

- Austin, TX, USA

While the cruise is set and traveling on the interstate, in this case 70mph, when I pass an 18 wheeler the adaptive cruise control senses an imminent collision while passing the 18 wheeler in the left travel lane. The adaptive cruise immediately alerts and engages the brakes. Fortunately, this has not yet resulted in a rear end collision in my case however I'm sure at some point it will with owners of these vehicles. This has happened twice since I purchased the F150 in January(2015) and both occurrences happened while passing a tanker truck specifically and while in the left lane- tanker truck was in the right lane traveling at a slower speed perhaps around 60-65mph. This defect to me appears to be very dangerous because if my F150 engages the brakes for no reason and there were to be cars behind me a rear end accident could likely occur on the interstate. Ford has been very slow in responding to this safety concern and has not came up with a fix for this issue. Many on internet are voicing concern however are told by dealers that the system is functioning as designed and sent on their way.

- Omaha, NE, USA

Adaptive cruise control was set and engaged on vehicle at 75 mph. My vehicle was traveling on inside lane of four lane divided highway and came up on slightly slower vehicle traveling in the same lane at around 70 mph. My vehicle slowed down and tracked the other vehicle for about a mile before coming up on a slower moving tractor trailer truck in the outside lane. As the vehicle in front on my truck passed the tractor trailer on the inside lane, it moved over in front of the tractor trailer to the outside lane to allow me to pass. Instead on speeding up to 75 mph, my truck started to brake before I disengaged the cruise control (around 65 mph). At that time, I was located beside the tractor trailer near the back of the trailer. A vehicle following me had to brake due my truck unexpected braking and slow down.

- Wake Forest, NC, USA

When driving at night in the far left lane going 72 mph with the adaptive cruise control on, the truck randomly slammed on the brakes and the red crash indicator flashed although there was nothing in front of the truck. If someone was behind me, it is likely they would have rear ended my vehicle. There seems to be a defect in the auto cruise control, although Ford believes this behavior is normal.

- Plate City, MO, USA