Which of the following are examples of temporary barriers?

Temporary barriers are designed for short-term use and can be easily moved or removed as needed. Jersey barriers, which are typically made of concrete but used primarily to separate different sections of roadways or to direct traffic during construction, exemplify this concept well. They provide a flexible and adjustable solution to control access or to protect areas temporarily without the permanence associated with more substantial constructions.

In contrast, options such as concrete walls and permanent fences are designed for long-term use and structural integrity, making them unsuitable as temporary barriers. Ropes can serve a temporary purpose but do not typically offer substantial physical protection or delineation of secure areas compared to Jersey barriers. Therefore, in the context of temporary barriers, Jersey barriers are the most appropriate choice due to their functionality and ease of relocation.