Final answer:
Red zones typically refer to safety buffer zones around heavy equipment, and while the distance can vary, a common practice might designate 10 to 15 feet as the red zone area to maintain worker safety.
Step-by-step explanation:
The phrase 'red zones' in this context is likely referring to safety protocols in industrial or construction settings. Often, red zones denote areas where there is a higher risk due to the operation of heavy machinery or other potential hazards. While the specific distance that constitutes a red zone can vary based on industry standards or company policies, a common safety practice might specify that red zones are 10 to 15 feet from the front, back, and extents of equipment. This buffer zone is meant to protect workers by keeping them a safe distance away from the operational range of machinery.