This category allows you to choose the default inner lane opening width type and view or edit the Opening Width design vehicle path radius and mountable curb start offset and the opening width settings.

Design Guidelines' Circulating Lane Opening Widths 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.

Opening Width design vehicle tire track offset

Select this option to have TORUS determine the circulating lane opening widths by offsetting the Opening Width design vehicle's tire track by the specified value.

Opening Width

Select this option to have TORUS draw the circulating lane opening widths based on the Opening Width value.

Opening Width Design Vehicle Radius

Specify the Opening Width design vehicle path's radius value. This is the radius of the path which the Opening Width design vehicle travels from the inside entry lane to the circulating lanes.

Mountable Curb Start Offset

Specify the mountable curb start offset value. This is the distance from the Opening Width design vehicle's outer tire track to where the projected offset intersects with the circulating lane's construction line.

Opening Width

Specify the Opening Width value.

Legend

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