Are roadway elevations depicted by the profile grade line?

The profile grade line is a critical element in roadway design and construction plans, as it represents the intended elevation of the roadway at various points along its alignment. This line indicates how the road will vertically relate to the surrounding terrain, showing rises and falls in the elevation. By examining the profile grade line, engineers and planners can determine how the roadway will interact with drainage systems, adjacent properties, and natural features.

Understanding the profile grade line is essential for ensuring safe and efficient drainage, controlling water flow across the roadway surface, and maintaining an optimal driving experience for users. The elevation data along this line serves as a guideline for grading and other construction activities. Additionally, it aids in the assessment of potential impacts on the environment and infrastructure throughout the construction process. Therefore, the correct choice is that roadway elevations are indeed depicted by the profile grade line.