When is a leveling course deemed appropriate for pavement?

• A. When surface is too smooth
• B. When the HMA mixture is failing
• C. When cracks are present
• D. When wear is minimal

Answer: (B)

A leveling course is deemed appropriate for pavement primarily when the existing Hot Mix Asphalt (HMA) surface exhibits significant issues, such as failure. This can involve problems like severe ruts, significant cracking, or overall deterioration that compromises the surface's integrity and performance. In such cases, a leveling course serves to restore the pavement's profile, ensuring a smoother and structurally sound base for any subsequent layers.

While other situations, such as the presence of cracks or minimal wear, may suggest potential maintenance needs, they do not necessarily require a leveling course to address surface failures. Therefore, recognizing the correct scenario where a leveling course becomes essential helps ensure effective pavement management and longevity.