Use the Flat Switchback function to automatically switch the direction of the current road from clockwise to anticlockwise (or vice versa) by generating a flat switchback.
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Click the Flat Switchback tool on the Pit Design Toolbar. If not already selected, you will be prompted to select a TOE, CREST or CONTOUR line on which a road has been created. |
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| If not already selected, you will be prompted to select the red road point on which to build the switchback. | |
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The following properties are displayed in the Flat Switchback Properties form:
Curve Radius
Specify a radius value that will be used to determine the extent and tightness of the curve of the turning area.
Road Switchback Angle
By default the switchback angle is 180°. To turn the road by a different amount, enter an angle value.
Radius Specified By
The radius is measured from a specified (Inner , Centre, Outer, or Custom ) point on the road, taking into account the road width (which is already defined as part of the properties of the road).
• Inner curve radius must be greater than 0
• Outer curve radius must be greater than the road width
• Centre curve radius must be greater than half of the road width
To measure the radius from a specific point on the road, select the Custom option and specify a value which is a factor of the road width.
Inset Radius
If the Inset Radius check box is selected, specify a secondary Curve radius value that will be used with the primary curve radius to determine the tightness of the curve of the turning area.
See Also