What should always be done before changing lanes?

Using your turn signal and checking your mirrors is essential before changing lanes because it enhances safety and communication on the road. Signaling with your turn signal informs other drivers of your intention to change lanes, allowing them to anticipate your move and adjust accordingly. This is crucial for minimizing the risk of collisions.

Additionally, checking your mirrors helps you assess the traffic situation around you, ensuring that the lane you are moving into is clear of vehicles or obstacles. This action allows you to make informed decisions and execute lane changes safely, contributing to overall road safety for yourself and other drivers.