Surface Preparation - Milling is defined by which features?

• A. Automatic grade controls
• B. Variable depth with texture
• C. Specified width, depth and cross-slope
• D. Portland cement content

Answer: (C)

Milling is defined by removing pavement in passes with controlled planimetric parameters: a specified width, a specified depth, and a maintained cross-slope. The width sets how wide each cut is, the depth determines how much material is removed, and the cross-slope ensures the milled surface drains properly for the subsequent overlay. Automatic grade controls relate to staying on grade but don’t define milling; variable depth with texture describes a feature of how the surface might be treated, not the standard defining elements; Portland cement content is irrelevant to asphalt milling since it concerns concrete materials, not asphalt removal.