In a work zone, which of the following is NOT considered a critical safety measure?

Providing refreshments to workers is not considered a critical safety measure in the context of work zone traffic control. While ensuring that workers stay hydrated and nourished can contribute to their overall well-being and performance, it does not directly impact safety measures that are vital for protecting both workers and motorists in a work zone.

In contrast, proper signage installation is crucial as it informs drivers and pedestrians about the work zone, helps to manage traffic flow, and communicates potential hazards. Restricting access to construction equipment is essential for preventing unauthorized personnel from getting too close to potentially dangerous machinery, thus reducing the risk of accidents. The use of high-visibility clothing is vital to ensure that workers can be easily seen by drivers, significantly lowering the chances of accidents occurring in a work zone due to lack of visibility. Each of these measures directly contributes to safety in a construction zone, whereas providing refreshments does not serve that immediate safety purpose.