325. ワイヤーロープ式バリア
ワイヤーロープ式バリアは、支柱で支持された張力鋼索からなる柔軟な道路側・中央分離帯用安全バリアです。車線を逸脱した車両を受け止め・方向修正し、より危険な障害物や対向交通へ到達する危険を減らします。
剛性コンクリートバリアと異なり、衝突時に大きく変形して衝撃エネルギーの一部を吸収します。設計、配置、ケーブル本数は道路配置、交通条件、必要な防護性能によります。
What is the purpose of a cable barrier?
A cable barrier is designed to contain or redirect a vehicle that leaves its intended path. It is commonly used to prevent vehicles from reaching dangerous roadside hazards or entering opposing traffic lanes.
How is a cable barrier different from a guardrail?
A cable barrier uses tensioned steel cables and is relatively flexible when struck, while a conventional guardrail normally uses a shaped steel beam supported by posts. Both are vehicle-restraint systems intended to reduce the consequences of certain crashes.
Can a cable barrier prevent every vehicle from crossing it?
No. Its performance depends on factors such as vehicle type, speed, impact angle and the design and condition of the barrier. Like other safety barriers, it is intended to reduce crash severity rather than guarantee that every vehicle will be stopped.

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