Which type of roadway is flagging restricted from?

Flagging is typically restricted from diamond streets primarily due to safety concerns and the unique design features associated with these types of roads. Diamond streets, often found in urban areas, are designed to facilitate efficient traffic flow in dense environments and may include special configurations that are not conducive to typical flagging operations. These configurations can create challenges in visibility and traffic management, making flagging less effective and potentially hazardous for both flaggers and motorists.

In contrast, highways, residential streets, and commercial roads are usually designed to accommodate some level of traffic control measures, including flagging, which is established for construction or maintenance purposes. Therefore, flagging is not suitable for diamond streets due to their specific design and operational characteristics.