Which flagging type requires the use of signs if located beyond 15 ft from the edge of any roadway?

Long-Term Stationary flagging operations are typically established for an extended period, such as days, weeks, or even months. When flagging is set up at a distance greater than 15 feet from the edge of the roadway, it becomes essential to use signs to alert drivers of the work zone ahead. This requirement ensures that motorists are properly informed about the upcoming conditions well before they reach the flagging area, thus enhancing safety for both the workers and the drivers.

In contrast, other flagging types, such as Mobile, Short Duration, and Intermediate-Term Stationary, may have different requirements regarding the use of signage depending on their specific operational contexts. Mobile flagging usually involves moving operations where the need for additional signage is less critical since the flagger is often closer to the roadway. Short Duration operations typically do not extend long enough for extensive warning signage to be needed, while Intermediate-Term operations could align more closely with Long-Term practices but still often do not require signs at the same distance if they do not have extended durations.

The emphasis on signage in Long-Term Stationary flagging at a distance greater than 15 feet plays a crucial role in ensuring that drivers have sufficient time to react to an altered roadway condition.