This category allows you to specify the truck apron width value for the central island's truck apron in the roundabout.

Design Guidelines' Tuck Apron Category Dialog Box

Truck Apron Section

Apron Width

Specify the truck apron width.

Vehicle Method

Select this check box to turn on automatic determination of the truck apron width when the roundabout is generated. This feature determines the truck apron width based on the Inscribed Circle Diameter or the Central Island Diameter value (whichever is selected in the Configuration section of the Configure Central Island dialog box) and the behavior of the design vehicle assigned to the Truck Apron aspect of the roundabout.