The Lantern ring, also known as a lantern roundabout, is a type of traffic sign that indicates the presence of a roundabout where vehicles must give way to traffic already circulating within the roundabout.

When approaching a lantern ring, drivers should be prepared to yield to vehicles coming from their left, as they have the right of way. This means you should slow down and, if necessary, stop to ensure that the way is clear before entering the roundabout.

Additionally, proper signaling when exiting the roundabout is important to inform other drivers of your intended maneuver. Always check your mirrors and blind spots to ensure it's safe before you change lanes or make your turn.

This type of traffic setup is used to enhance traffic flow and safety by organizing the merging of vehicles and eliminating the need for stop signs at intersections, which can lead to delays and potential accidents.