long section profile along a line at or offset from a horizontal alignment. 2D coordinate axes are alignment distanceAlong and ground elevation. State distinguishes between existing ground surface vs. proposed design profile.
part of a horizontal alignment having a single geometric representation (either line, circular curve, clothoid, or other spiral)
PositioningElement which provides a Linear Referencing System for locating PhysicalElements. An Alignment shall be continuous, non-branching, and non-overlapping. If it is a Project Alignment, it is for a single alternative, as specified by its owning ProjectPart.