Which of the following is a safe practice when changing lanes?

Signaling your intention and checking mirrors is essential for safe lane changes because it communicates your plans to other drivers and helps ensure that you are aware of the traffic situation around you. Signaling informs other road users that you intend to move into another lane, allowing them time to react appropriately.

Checking mirrors is equally important as it provides a comprehensive view of your surrounding environment, helping you identify any vehicles in your blind spots or areas that may not be easily visible through your mirrors. This practice minimizes the risk of collisions and enhances overall road safety.

In contrast, changing lanes quickly without signaling creates confusion for other drivers and significantly increases the risk of accidents. Likewise, relying solely on the rearview mirror neglects critical areas of visibility, and signaling only after changing lanes means that other drivers are left unaware of your intentions until it's potentially too late.