Buffer stop is a term used in railway terminology to refer to the stopper or bumper that prevents trains from running off the tracks. The spelling of this word can be explained using the International Phonetic Alphabet (IPA) as /ˈbʌfər stɒp/. The first syllable is pronounced as "buhf-er" with the stress on the first syllable. The second syllable is pronounced as "stahp" as in the word "stop". This word is often used interchangeably with other terms of railway jargon such as stop block, bumper or a stop board.
A buffer stop refers to a safety device installed at the end of railway tracks or tramlines to prevent trains or trams from overshooting the platform or entering restricted areas. It is designed to absorb the kinetic energy of a moving vehicle, prevent damage to equipment, and ensure the safety of passengers and crew on board.
Typically, a buffer stop consists of a solid, heavy structure made of materials like steel or concrete, positioned at the terminal side of the railway line. The purpose of this device is to provide a cushion and gradual deceleration for a train or tram approaching the end of the tracks. When a vehicle makes contact with the buffer stop, the impact force is absorbed by mechanisms such as hydraulic or pneumatic systems, springs, or energy-absorbing materials.
Buffer stops are essential safety features of railway infrastructure as they prevent derailments, collisions, and minimize damage to both the vehicle and the platform. They can also incorporate additional safety elements such as warning lights or signs to further enhance visibility and awareness.
In addition to their safety functions, buffer stops also serve as reference points for train drivers or tram operators, allowing them to accurately align and stop their vehicles precisely where intended. By acting as a physical barrier, buffer stops offer a reliable means of controlling the position and speed of moving trains or trams at the end of the tracks, ensuring operational efficiency and passenger safety.
The word "buffer stop" has its origins in the realm of railways.
The term "buffer" refers to a device placed at the end of a railway track to absorb shock and minimize damage in case a train overshoots the track. It consists of a strong, springy material that can compress and absorb the impact. The primary purpose of buffers is to provide a gentle stop or cushioning effect, preventing the train from crashing into structures or other trains.
As for the word "stop", it simply refers to the action of stopping or halting the movement of the train.
Therefore, the etymology of "buffer stop" can be understood as a compound word derived from the function and purpose of the device itself.