Define design vehicles for which the roundabout circulatory area will be checked.
Click on Swept Path Analysis in the left hand pane. The Swept Path Analysis page is displayed.
Expand Swept Path Analysis in the left hand pane to see currently defined design vehicles. Select a vehicle to see its details in the right-hand pane.
Click New Vehicle in the Design Vehicle frame to create a new design vehicle. The Design Vehicle dialogue is displayed.
The Design Criteria frame lets you specify the offsets from kerb and road markings.
The Vehicle Path Clearance is the minimum distance between the inscribed circle curb and the outer body envelope of the design vehicle turning in steady state around the roundabout. This value is used by Roundabouts, in conjunction with the design vehicle critical dimensions, solely to calculate the minimum circulatory width required. It is not used to limit the placement of actual paths on the roundabout.
The Separator Line Path Offset is the minimum distance between the circulatory road markings and the outer body envelope of the design vehicle turning in steady state around 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.