Automatic emergency braking is a safety feature that kicks in just before an imminent collision, helping the driver avoid impact. Most vehicles with automatic braking will also alert the driver with an audio or visual warning before a collision. However, if the driver doesn't respond, then the car will automatically apply the brakes.
This function is becoming more standard in new vehicles. In fact, in September 2015 10 of the biggest automakers committed to making automatic emergency braking standard. These car makers include Audi, BMW, Ford, General Motors, Mazda, Mercedes Benz, Tesla, Toyota, Volkswagen, and Volvo.