Separation is a property of the area, not of the person
High visibility clothing and awareness help, but they are not separation. What actually reduces risk is a physical or temporal gap: cleaning a route when no plant is running in it, working behind a barrier, or restricting the attendance to marked pedestrian areas. The plan should classify each area by which of those applies rather than relying on a general instruction to be careful.
Sites usually already have this thinking in their traffic management plan, and the cleaning arrangement should adopt it rather than invent a parallel one. Reading that plan during the walkthrough often answers most of the scheduling questions immediately, because it identifies where pedestrians are permitted and when. Aligning to it also means the cleaning team is following rules the site's own staff already understand.
