How should deficiencies be marked when using a rolling straightedge?

When assessing the surface of asphalt pavement, using a rolling straightedge is essential for identifying deviations that can affect ride quality and safety. The correct method for marking deficiencies involves marking the center wheel to indicate both the start and end points of the imperfection. This approach ensures that the exact extent and location of the deficiency are clearly understood for any necessary corrective measures.

Marking the center wheel provides a reference point for measuring how far the surface deviates from the desired grade or smoothness. It allows construction teams to address the deficiency effectively by seeing not only where the issue begins but also where it ends, helping to determine the length of the area that might require remediation.

Other approaches, like marking only the ending point of the deficiency or recording height measurements without clear visual indicators, would be less effective. Such methods may lead to confusion regarding the specific area requiring attention. Similarly, using cones to outline the deficiency area may help in visual identification, but does not provide the precise measurement data needed to understand the severity of the issue or to apply refinements accurately. Thus, the correct method combines both identification and measurement for a comprehensive evaluation of the pavement surface conditions.