Is the statement "A functional overlay is used when structural problems are present in the existing pavement" true or false?

The statement "A functional overlay is used when structural problems are present in the existing pavement" is false. A functional overlay typically refers to a thin layer of asphalt applied to the surface of existing pavement primarily to improve its functional characteristics, such as providing enhanced skid resistance, reducing noise, or addressing surface distress like ruts or cracks. This type of application is not intended to resolve underlying structural issues, which would require a different type of treatment, such as a thicker structural overlay or full-depth repairs.

In cases where structural deficiencies exist, engineers often recommend more intensive solutions that address the underlying problems rather than merely improving the functionality of the surface layer. It is crucial to correctly identify the condition of the existing pavement to select the appropriate treatment method.