Add a fixed curve defined by specified radius, direction, and start and end points.
The result is a three-point curve. The pass-through point between the end points (1, 4) is located at the curve mid point.
Tip
You can use transparent commands when you are prompted to specify direction, radius, or length, or use station offsets to specify any points. For more information, see Transparent Commands.
To add a fixed curve (two points and radius)
- Click the alignment. Click Alignment tab
Modify panelGeometry Editor
. - On the Alignment Layout Tools toolbar, click
Fixed Curve (Two Points And Radius). - Specify the start point.
- Specify a radius, or enter D to specify the degree of curvature.
Specify a new value, or press Enter to accept the value that is displayed on the command line.
- If the alignment has design criteria applied to it, the minimum value for the current design speed is displayed.
- If the alignment does not have design criteria applied to it, the default value specified in the curve and spiral settings is displayed. For more information, see Curve and Spiral Settings.
NoteTo calculate the radius or degree of curvature using other known curve parameters, enter 'CCALC to open the Curve Calculator. For more information, see Calculating Curve Parameters. - Specify the curve direction, either clockwise or counter-clockwise. A preview of the curve is displayed.
- Specify the end point.