What is the primary function of an end-of-train device (EOT)?

The primary function of an end-of-train device (EOT) is to monitor the rear car brake status and communicate with the locomotive. The EOT is equipped with technology to ensure that the train crew is aware of the condition of the braking system at the end of the train. It serves as a critical safety device by transmitting information about brake pressure and other important data back to the locomotive. This communication helps the engineer or conductor make informed decisions about train operations and enhances the overall safety of train travel.

By actively monitoring the brake status at the rear of the train, the EOT helps ensure that all cars are properly braking, which is vital for maintaining control during operations, especially when going downhill or in emergency situations. This functionality is integral to the efficient and safe operation of freight and passenger trains.