Add a free reverse spiral-line-spiral group, with specified spiral lengths, between two curves.
The two spirals bend in opposite directions. You specify the spiral lengths (2, 3). The line length is automatically calculated. If either of the attachment curves (1, 2) are edited, the spiral lengths do not change.
In this command you can specify the spiral parameters, but not the line length. Line length is calculated automatically.
To add a free reverse spiral-line-spiral (between two curves, spiral lengths)
- Click the alignment. Click Alignment tab
Modify panelGeometry Editor
. - On the Alignment Layout Tools toolbar, click
Free Reverse Spiral-Line-Spiral (Between Two Curves, Spiral Lengths). The current spiral definition is displayed at the command line. For more information about changing the default spiral definition, see Specifying Curve and Spiral Settings.
- Specify the entity before and the entity after to which you want to add the spiral.
- Specify either the length or the A value for the spiral in and the spiral out.
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.