Which of the following is a type of design that you would typically use an alignment for?

• A. Building
• B. Parking Lot
• C. Garden
• D. Road

Answer: (D)

An alignment defines the horizontal path of a linear feature, storing the sequence of tangents, curves, and vertices that guide how the feature runs in plan. This is crucial for roads because the centerline geometry sets the straight and curved sections, controls transition geometry, and serves as the backbone for profiles and corridor design. Buildings or gardens are typically defined by outlines or parcels rather than a centerline path, and while a parking lot might use lines for layout, the primary reason to use an alignment is to define the road’s precise horizontal geometry. Therefore, the design type you would typically use an alignment for is a road.