Final answer:
Buffer space is the designated empty area for protection or recovery purposes, crucial for safety in infrastructure planning and design.
Explanation:
Buffer space is the empty area designated for various purposes, such as protection or recovery. In the context of recovery of errant vehicles, it refers to the space allocated for this specific purpose.
For example, in highway design, a buffer space would be the area left next to the main road to ensure safety in case a vehicle veers off the road.
Understanding and implementing proper buffer space is crucial in infrastructure planning and design to enhance safety measures.
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