Expand Arm Geometry and click on the Slip Lane then the Slip Lane Curve tab.
The Inner Curb Offset is the gap between the edge of the travelway and the island.
The Outer Curb Offset is he gap between the edge of the travelway to the outside of the slip lane.
The Entry Radius is the radius of the first arc.
The Middle Radius is the radius of the middle arc.
The Exit Radius is the radius of the third arc.
Select Island to set the standards of the slip lane island.
The Entry Island Radius is the radius of the end of island at the entry of the slip lane.
The Exit Island Radius is the radius of the end of island at the exit of the slip lane.
The Entry Island Width is the width of the island that is parallel to the Deceleration Region Length.
The Exit Island Width is the width of the island that is parallel to the Acceleration Region Length.
The Main Island Width is available when Fixed Arcs with Tangential Lines is selected for the Calculation Method and is the width of the island between the slip lane and the roundabout.
In all cases the Max and Min values represent the limiting values from the adopted design standard and the Default value will be used when the roundabout is first placed. A default value MUST be provided but Max and Min may be blank if there is no limiting value.