Road markings are defined in the standard and placed automatically. However, they can be adjusted in Roundabout Properties.
Click Road Markings in the left-hand pane. The Road Markings page is displayed.
The markings are grouped by arm and location. Click the [+] adjacent to an arm to list the marking locations.
Highlight a marking and click the Edit button to make changes to individual markings.
Use the Select All and Clear All buttons to select or clear all the check boxes.