The buffer space at a traffic incident is defined as:

The buffer space at a traffic incident is defined as an area that separates traffic flow from the work area. This space is crucial for the safety of both emergency responders and the motoring public. The buffer zone serves to create a physical barrier, allowing emergency personnel to operate without the immediate danger posed by moving traffic. By providing this separation, the buffer space helps reduce the likelihood of accidents and injuries at incident scenes, allowing first responders to perform their duties more safely and effectively.

The other choices do not encapsulate the primary purpose of the buffer space. For example, while safe vehicle parking is important at a traffic incident, it is not the defining characteristic of the buffer space. Similarly, while there are designated parking zones for emergency vehicles, these do not specifically refer to the buffer space. An area restricted to personnel only is also less about separation from traffic and more about limiting access for safety. The key point here is the buffer space’s role in safeguarding the work zone from the ongoing flow of vehicle traffic.