This category allows you to view and edit the approach radius 1 values applied to the FDOT Geometric Design Method roundabouts.

Design Guidelines' Approach Radius 1 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.

Radius

Specify the radius value of the Approach Radius 1 arc.

Start

Specify the starting point value of the Approach Radius 1 arc. This is measured from the intersection of the Inscribed Circle Diameter and the leg reference geometry to the starting point of the arc on the leg reference geometry.

Legend

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