What safety feature automatically engages trailer brakes?

The breakaway cable system is designed to enhance safety by automatically engaging the trailer brakes if the trailer becomes disconnected from the towing vehicle. This system typically consists of a cable that is attached to the trailer's brake system and is also connected to the towing vehicle. When the trailer separates from the vehicle, the cable pulls a pin or lever that triggers the brakes to lock. This action helps bring the trailer to a stop instead of allowing it to roll away uncontrollably, thereby preventing accidents and ensuring safety on the road.

The other options serve different functions. The emergency brake assist system is intended to help the driver when suddenly needing to stop, but it doesn't specifically engage trailer brakes in the event of separation. The stabilizer bar system primarily works to reduce sway in the trailer during towing but does not engage brakes. Similarly, the trailer sway control system helps maintain control during swaying movements, but it does not automatically activate the brakes if the trailer disconnects. Each of these systems contributes to the overall safety of towing but does not perform the specific function of engaging trailer brakes upon disconnection like the breakaway cable system does.