What are the stakes called that guide final grading at subgrade elevations in road construction?

In road construction, the stakes that are used to guide final grading at subgrade elevations are referred to as "Blue Tops." These stakes serve as reference points to ensure that the grading process achieves the specified elevation and slopes required for proper drainage and structural integrity of the road.

The use of Blue Tops is significant in that they provide a visual and physical aid for the construction crew, ensuring that all work conforms to the project plans and specifications. When marked correctly, they help prevent over-excavation or insufficient grading, which can lead to issues such as water pooling or inadequate support for the road surface.

Understanding the role of Blue Tops is crucial for maintaining the quality and performance of the roadways being constructed. In contrast, other terms like Red Flags, Green Stakes, and Yellow Markers may have different meanings or usages in construction but do not specifically refer to the stakes used for final grading at the subgrade level.