Expand Arm Geometry and click Outer ETW Construction in the left hand pane.
- Single Arc: The side is based on the radius of a single arc.
- Line-Arc: The side is based on a line, then an arc.
- Arc-Tangent-Arc: The side is based on a arc, then a tangent line, then another arc.
The Entry Radius sets the entry section of the arm's radius along the outer edge.
The Entry Taper Radius sets the initial entry taper radius along the outer edge.
The Inter-Arm Radius sets the radius where the arm meets the roundabout.
The Exit Radius sets the exit section of the arm's radius along the outer edge.
The Exit Taper Radius sets the exit taper radius along the outer edge.
- Unchecked: Changes to the Distance values update the equivalent Ratio value
- Checked: Changes to the Ratio values update the equivalent Distance value
The Entry Radius sets the entry section of the arm's radius along the outer edge as a ratio.
The Entry Taper Radius sets the initial entry taper radius along the outer edge as a ratio.
The Inter-Arm Radius sets the radius where the arm meets the roundabout as a ratio.
The Exit Radius sets the exit section of the arm's radius along the outer edge as a ratio.
The Exit Taper Radius sets the exit taper radius along the outer edge as a ratio.