Historically, if you wanted to apply transitions to the dimensions of a corridor model, it required the use of horizontal or vertical targets. That said, not every subassembly supports targeting, and the ones that do may not apply to the dimensions you’d like to transition. This usually meant creating your own custom subassemblies from scratch. Fortunately, using Civil 3D 2023.2, we can apply transitions to virtually any dimension of any subassembly without the need for targets or custom parts.
Transitions are created (and managed) using a brand new tab in the Panorama called “Corridor Transition.” This tab allows users to create transition sets by simply selecting a subassembly (and the parameter they wish to transition) followed by the start/end stations and parameter values. Civil 3D will then calculate the transition as a “straight line” or by following a specified curvature principle.
This tool can be helpful when modeling curb lowerings, transitional daylighting, or when component widening (or thickening) is required! If you are interested, I’ve created a quick video to help you get started.
-Jeff
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