Differentiate cross-section, long-section, and profile in roadway earthwork design.

Differentiate cross-section, long-section, and profile in roadway earthwork design.

• A. Cross-section shows the route's elevation along the centerline; long-section shows vertical geometry across the route; profile shows horizontal alignment.
• B. Cross-section shows vertical geometry across the route; long-section shows elevations along the alignment; profile is the elevation view along the route's centerline.
• C. Cross-section is the plan view; long-section is a side view; profile is a 3D representation.
• D. Cross-section shows grade lines only; long-section and profile are variations of plan views.

Answer: (B)