Home Departments Engineering Information and Education Information and Education Traffic Signs The following videos provide information on the need for and proper use of speed limits and stop signs. The videos will open in a new window. Speed Limits Stop Signs Roundabouts While there are currently no roundabouts in Lebanon, they are increasing in number around the country. The following videos give a basic overview of roundabouts and how to safely travel through them. The videos will open in a new window. How to Travel Through a Roundabout Driving Tips for Roundabouts