Correct answer
Protect against vehicles leaving the road.
Protect against vehicles leaving the road. They are vehicle restraint systems and do not guarantee preventing every departure or injury. Reflective devices attached to them have a separate guiding function. A safety barrier must not be confused with a sign ordering a manoeuvre or regulating priority.
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By themselves regulate priority at every junction.
Protect against vehicles leaving the road.
Replace occupants’ seat belts.
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