When must you signal to change lanes?

To change lanes safely, signaling is an essential part of informing other drivers of your intentions. It is important to signal at least 3 seconds before making the move to give other drivers enough time to react. This advance warning ensures safe driving practices, as it helps prevent accidents that could result from unexpected lane changes.

In addition, signaling ahead of time contributes to better communication among drivers and maintains the flow of traffic. The 3-second rule is a guideline that balances the need for safety with the need for clear communication on the road. This timing allows you to assess the space around you, check your mirrors for any vehicles in your blind spots, and execute your lane change without causing confusion or hazards for others on the road.