You have full freedom and flexibility to concept design intersections with the new intersections advanced editor. This will allow you to sketch:

curb extensions within an offset intersection

multi-radii corners

more accurate sidewalk shapes: edit inner and outer corners independently

simple roundabouts

To get started,

Click on an intersection

Click on any corner or lane connection

Click on the "Advanced edit mode" icon in the toolbar:

After opening the editor, you can click on a lane line or curb line:

You will see the line editor with different line type options:

Linear edge - straight lines

S-curve - a curve that is used to model curved tapers and transitions

Arc - a curve used to model asymmetrical corners or oval-like curves

You can update the radius of a curve by clicking on the rounded curb line and updating the radius.

There are two ways to update the radius:

Update the radius number in the toolbar above

Drag the diamond-shaped handle

Learn more about how to sketch advanced corners, lane connections, and simple roundabouts here: