Curve and Spiral Settings Dialog Box

Use this dialog box to enter the curve settings you want to use when creating alignments or parcels using the Tangent-Tangent (With Curves) command and to specify the spiral defaults.

While you can select various combinations of Spiral In, Curve, and Spiral Out, the A value of the spirals is controlled by the radius of the curve. The length of the spirals is controlled by changing the A Value.

Note: If the alignment has design criteria applied to it, the default values specified in the Curve and Spiral Settings dialog box will not be used. Instead, the minimum values in the specified design criteria file will be applied.

Type

Specifies the spiral type.

Note: The spiral type you specify is used in all spiral commands on the Alignment Layout Tools toolbar.

Spiral In

Specifies whether your design includes a spiral either before a curve or before a Spiral Out.

Length

Specifies the length for the Spiral In.

A Value

Specifies the A value for the Spiral In.

Curve

Specifies how a curve is inserted: either with or without the Spiral In, with or without the Spiral Out or by itself.

Radius

Specifies a radius value. This value applies to curves and spirals. If you change the curve radius, the A value also changes.

Spiral Out

Specifies whether your design includes a Spiral Out.

Length

Specifies the length for the Spiral Out.

A Value

Specifies the A value for the Spiral Out.