Which component defines cross-section width changes within a corridor?

Which component defines cross-section width changes within a corridor?

• A. Corridor Assembly
• B. Alignment
• C. Profile
• D. Surface

Answer: (A)

The thing that controls how the width of a corridor cross-section changes along the route is the Corridor Assembly. In Civil 3D, the corridor uses an alignment to define the centerline path and a corridor assembly to define the actual cross-sectional shape at each station. The assembly contains subassemblies that specify the widths of lanes, shoulders, medians, curbs, ditches, and other elements, and these widths can vary along the corridor through transitions or different regional definitions. That’s why changes in cross-section width are modeled within the Corridor Assembly. The alignment just defines where the corridor runs, the profile defines elevation along that path, and the surface represents the terrain; none of these directly set how wide the cross-section is at each point.

The thing that controls how the width of a corridor cross-section changes along the route is the Corridor Assembly. In Civil 3D, the corridor uses an alignment to define the centerline path and a corridor assembly to define the actual cross-sectional shape at each station. The assembly contains subassemblies that specify the widths of lanes, shoulders, medians, curbs, ditches, and other elements, and these widths can vary along the corridor through transitions or different regional definitions. That’s why changes in cross-section width are modeled within the Corridor Assembly. The alignment just defines where the corridor runs, the profile defines elevation along that path, and the surface represents the terrain; none of these directly set how wide the cross-section is at each point.