This subassembly creates a cross-sectional representation of finish grade, pavement, and subbase for urban, parabolic lanes between the left and right edges of traveled way.
The parabolic shape is simulated by a series of short, straight-line links. No superelevation is applied to the travel lanes. The pavement structure follows the standards described in “Pavement Structure on Paved Sections” in the AutoCAD Civil 3D Help.
The attachment point is at the crown of road on the finish grade surface. This component is symmetrical about the attachment point.
Note: All dimensions are in meters or feet unless otherwise noted. All slopes are in run-over-rise form (for example, 4 : 1) unless indicated as a percent slope with a “%” sign.
This section lists the parameters in this subassembly that can be mapped to one or more target objects. For more information, see in the AutoCAD Civil 3D User’s Guide Help.
The center of the string line is calculated by subtracting the Crown Height from the attachment point, and the left and right edges-of-traveled-way are calculated by applying the Width and Slope symmetrically about the attachment point. The ordinates of the parabolic curve are calculated at even intervals along the string line, and straight line links are added to connect the ordinate points. Parallel surfaces are inserted for the Pave1, Pave2, Base, and Subbase surfaces from the given depths.
In layout mode, this subassembly displays the lane links calculated from the given input parameters.
The following table lists the point, link, and shape codes for this subassembly that have codes assigned to them. Point, link, or shape codes for this subassembly that do not have codes assigned are not included in this table.
