What is the control point on a finished roadway surface called?

The control point on a finished roadway surface is referred to as the profile grade point. This term specifically represents a key elevation point along the roadway that is used as a reference for establishing the finished grade and ensuring uniformity in surface elevation. The profile grade point is critical in roadway design, allowing engineers and construction teams to maintain the intended slope and drainage characteristics of the road, which are essential for safe and effective traffic flow. It serves as a baseline against which other elevations can be measured, ensuring that the roadway construction aligns with the design specifications. This makes it a fundamental aspect of roadway construction and planning.