This subassembly is used to insert intersecting links between two points.
It is typically used to place intersecting slopes to a V-ditch between the edges of two adjacent or merging roadways. A flat-bottomed ditch can also be specified.
Attachment
The attachment point is at the outside edge of either the left or right intersecting slope, and the previously defined marked point must be on the opposite outside edge. It does not matter which point is left or right of the other. When prompted for marker point, choose attachment point. Be sure to name the marked point and set the marked point name in this subassembly.
Input Parameters
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.
|
Parameter |
Description |
Type |
Default |
|---|---|---|---|
|
Marked Point Name |
Name of the previously defined marked point |
String |
None |
|
Slope 1 |
Slope (x : 1) of the link extending inward from the attachment point. Negative slope values are downward. |
Numeric |
-4 ( : 1) |
|
Slope 2 |
Slope (x : 1) of the link extending inward from the marked point |
Numeric |
-4 ( : 1) |
|
Ditch Width |
Width of the bottom of the median ditch (zero for a V-ditch) |
Numeric, positive |
0.6 m 2 ft |
Target Parameters
This section lists the parameters in this subassembly that can be mapped to one or more target objects, such as a surface, alignment, or profile object in a drawing. For more information, see To Specify Corridor Targets.
Target Parameters: None.
Output Parameters
None.
Behavior
The locations of the attachment point and marked point are determined. The marked point may be either to the right or left of the attachment point. Links are extended inward at Slope 1 from the attachment point, and Slope 2 from the marked point, until they intersect. If a non-zero ditch width is given, a horizontal bottom-of-ditch link is fit into the intersecting side slopes.
Layout Mode Operation
In layout mode, this subassembly calculates and displays the intersecting links and optional ditch bottom based on the input parameters given and the relative locations of the attachment and marked points.
Point, Link, and Shape Codes
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.
|
Point, Link, or Shape |
Code |
Description |
|---|---|---|
|
P2 |
Ditch_In Ditch |
For non-zero ditch width, the edge of ditch closest to the attachment point. If the ditch width is zero, use Ditch. |
|
P3 |
RMedDitch |
For non-zeroditch width, the edge of ditch closest to the marked point |
|
L1 – L3 |
Top Datum |
Finish grade on unpaved shoulder and median links |
Coding Diagram
