Do you use targets to modify the width of a lane or sidewalk? Would you like to vary a daylight slope over a station range? Are you looking for a different way to handle driveway curb letdowns? If you said yes to any of these, the 23.2 update for Civil 3D has a new feature that can help. Read on.
You probably know that geometry can be drawn, a polyline or alignment, and then defined as a target to change the width of a lane or sidewalk.
This works well, but there is a new option now. It’s called Corridor Transitions. Essentially, you can get the same result, but instead of drawing that geometry, the widths can be defined in a tabular format.
- Select a corridor and choose Edit Corridor Transitions in the ribbon.
- Enter values in the panorama that define the transition you need.
- Click Apply.
Here, the width parameter of the LaneSuperelevationAOR is being controlled by the values in yellow. There are 3 stations ranges that define where and how the transition happens. Also, the DaylightMultiIntercept slope parameter is being controlled by the values in green. It transitions from a 2:1 slope to a 1:1 slope between 4+80 to 5+60, then there are 2 other transition regions after that.
To define a driveway curb letdown, use the same procedure, except that the subassembly parameter that is varied would be the curb height. 3 transition regions will define a single letdown.
- From 0.75 to 0.1
- From 0.1 to 0.1
- From 0.1 to 0.75
Enjoy!