Expand Arm Geometry and click on the Exit tab.
The Design Speed is the speed at the intersection of the exit splitter and the inscribed circle.
Exit Lanes refers to the number of designated lanes at the exit point. Select a value from the drop-down list.
The Exit Lane Width (Single) refers to the permitted lane width when there is only a single lane at the exit. This is measured between the nearside and offside definition lines.
The Exit Lane Width (Multiple) refers to the permitted lane width when there is more than one lane at the exit. This is measured between lane separator lines or between lane separator lines and definition lines in the case of the nearside and offside lanes.
The Nominal Overall Road Width is calculated as the number of Entry Lanes multiplied by the Lane Width (Multiple). If there is only one lane, the value from Lane Width (Single) is used.
Select Equal Spacing Between Lanes to even out the lane width.
The Longer Inner Lane Line defines which lane is longer (outer/inner) when adding extra lanes.
If this exit is not relevant to flow calculations, e.g. it might be a service road, then select Ignore in Capacity Calculations.
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.