Final answer:
The term for the space that separates road user flow from a work space or an unsafe area, and which provides recovery space for errant vehicles, is known as a Buffer Zone. It is different from Safety, Transition, and Merge zones.
Step-by-step explanation:
The term that describes the lateral and/or longitudinal area that separates road user flow from the work space or an unsafe area is known as a Buffer Zone. This provides some recovery space for an errant vehicle. A safety zone pertains to a designated area for the protection of pedestrians, while transition and merge zones pertain to areas where vehicles change lanes or combine their flow. For example, in a city like New York (as displayed in Figure 3.2), walkers and drivers must follow two-dimensional, zigzagged paths along roads and sidewalks, where buffer zones play an important role in managing traffic and ensuring safety.
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