This category allows you to view and edit the circulatory offsets.

Design Guidelines' Circulatory Offsets Category Dialog Box

In the dialog box, move the mouse pointer over the controls to view the associated tooltip and then reference the controls described below.

Note: For the purposes of describing the software, it is assumed that Right-Hand Traffic is selected under Traffic Direction in Design Guidelines' General Category. If Left-Hand Traffic is selected, the descriptions with references to a right/left turn path should be interpreted in the opposite direction.

External Circulatory Offset

Specify the external circulatory offset value. This is the distance from the inscribed circle diameter to the closest tire track of the vehicle.

Internal Circulatory Offset

Specify the internal circulatory offset value. This is the distance from the central island to the closest tire track of the vehicle.

External Lane Offset

Specify the external lane offset value (for a multiple lane roundabout). This is the distance from the line dividing the lanes to the closest tire track of the vehicle traveling in the external lane.

Internal Lane Offset

Specify the internal lane offset value (for a multiple lane roundabout). This is the distance from the line dividing the lanes to the closest tire track of the vehicle traveling in the external lane.

Legend

For a description of the elements drawn in the roundabout in this category, see Roundabout Illustration Legend.