lan can bảo vệ
/ˈɡɑːd reɪl//ˈɡɑːrd reɪl/The term "guard rail" originates from the 19th century, when it was known as a " protective rail" or "safety rail." Its creation became necessary due to the increased use of steam locomotives and the consequent development of railroad infrastructure. Initially, train stations and platforms had no barriers to prevent objects or people from falling onto the tracks, posing a significant danger to both passengers and train personnel. As the railroad industry grew, construction companies suggested installing handrails to stop objects from rolling onto the tracks, which eventually improved safety and minimized the number of accidents. The term "guard rail" was coined to describe these safety measures because they helped to protect both people and trains from harm. With time, the use of guard rails expanded to other transportation systems, such as highways and bridges, where they serve as barriers to prevent vehicles from falling off steep inclines or ravines. Overall, the introduction of guard rails played a crucial role in making transportation safer for everyone involved.
a bar placed on the edge of a path, a boat, etc. to protect people and prevent them falling over the edge
một thanh chắn được đặt ở mép đường, mép thuyền, v.v. để bảo vệ mọi người và ngăn họ rơi xuống mép
a strong low fence or wall at the side of a road or between the two halves of a major road such as a motorway or interstate
hàng rào hoặc bức tường thấp chắc chắn ở bên đường hoặc giữa hai nửa đường chính như đường cao tốc hoặc đường liên bang
