Signal lights, also known as turn signals, are tools for communicating with other drivers. Using them properly prevents confusion and accidents.Use signal lights whenTurning left or rightChanging lanesMerging into trafficExiting or entering parking areasBefore making a U-turnTurn on the signal light 3–5 seconds before turning. Always turn it off afterward to avoid misleading others. Signaling is not a suggestion — it’s a driver’s responsibility and a legal requirement.