What is required to change from foul time to unrestricted operations?

To transition from foul time to unrestricted operations, it is essential to obtain approval from the Roadway Worker In Charge (RWIC). This individual has the authority to assess the safety and readiness of the work environment before operations resume. The RWIC will ensure that conditions are safe for unrestricted operations and that all necessary precautions have been followed.

The other options do not fully meet the requirements for changing to unrestricted operations. While safety training (completion of safety training) is crucial in the overall RWP context, it is not a direct condition for this specific transition. If all crew members must leave the area, it may indeed impact whether operations can proceed safely, but it is not the primary factor for approval. Lastly, significant weather changes may require reevaluation of conditions but are not a stipulated requirement for the change from foul time to unrestricted operations. Therefore, the correct requirement lies in obtaining the necessary approval from the RWIC to ensure a safe operational environment.