- Click the alignment. Click
Find. - On the Alignment Layout Tools toolbar, click
Free Spiral-Curve-Spiral (Between Two Entities). - Select the entity from which you want to add the spiral-curve-spiral.
- Select the entity to which you want to add the spiral-curve-spiral.
- Select the spiral-in length by picking two points in the drawing or by entering a spiral-in A value.
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.
- Select the spiral-out length or enter a spiral-out A value.
- Specify whether the curve solution angle is either greater than or less than 180 degrees.
- Specify a radius by either entering value or selecting two points in the drawing. Or, enter D to specify the degree of curvature
To display a curve preview you must either pick a point in the drawing or enter a coordinate value. Then, rubber band is drawn to the cursor from the selected point and the curve preview is displayed.
Note: To calculate the radius or degree of curvature using other known curve parameters, enter 'CCALC to open the Curve Calculator.Note: If you enter an A value for either the spiral-in or the spiral-out value, then the curve preview is not displayed when you specify the radius.