The recurring failure is the boundary between the contractor's responsibility and the operator's. The trade leaves at the end of a shift, housekeeping arrives on a different schedule, and the public uses the route in between.
The protected party. Ordinary construction safety concerns workers who are trained, briefed and equipped. This concerns members of the public who have had no briefing, are not looking for hazards and may be seeing the space for the first time. The controls are not interchangeable.
As a walking surface in its own right: width, surface condition, the transitions on and off it, the protection between it and the work zone, and the wayfinding directing people onto it, with additional attention to whether it was maintained across the life of the works.
That is usually the question these matters turn on, and it is answered from the contract scopes, the site rules, the phasing plan and what the parties actually did. The analysis sets out who controlled the route at the relevant time and what each scope required.
Yes. Dust, slurry, tracked material, adhesive residue and water from cutting or cleaning are foreseeable products of construction that reach the public route. Whether they were contained at the boundary, cleaned on an adequate cycle and warned about while present is part of the assessment.
Directly. An airport concourse is the most demanding version of the same problem: continuous public traffic, no possibility of closure, multiple trades working at once and unfamiliar visitors under time pressure. Controls that work there translate readily to other settings.
The phasing or logistics plan, the site rules issued to trades, the permit conditions where the work was permitted, and any daily reports describing what was open and what was closed on a given date. Together they establish what the route was supposed to be at the time.
Chicago & Cook County