Ars Technica: Why emergency braking systems sometimes hit parked cars and lane dividers
Make sure you read the car's manual:
"vehicles are programmed to ignore stationary objects at higher speeds"
"a car's adaptive cruise control system was often a totally separate system—made by a different supplier and using different sensors—from the lane-keeping system"
"a lot of emergency braking systems simply don't try to brake for obstacles when the vehicle is traveling at high speeds"