AutoCAD Civil 3D 2018 Roundabouts can display many of the standard road markings that are commonly used in the vicinity of roundabouts. If you have Line Design Pro from Design Pro Software, AutoCAD Civil 3D 2018 can link to it dynamically and draw the markings in accordance with TSRGD. Click Road Markings in the left hand pane. The Road Markings page is displayed.
Click New to create a new road marking. The Road Marking dialog is displayed.
To edit a particular road marking, highlight it and click Edit or simply double click on the line. The Road Marking dialog is displayed.