Which of the following should you do before changing lanes?

Signaling for all lane changes and turns is essential for safe driving. This practice communicates your intentions to other drivers and helps prevent accidents. By using your turn signals, you alert nearby vehicles and pedestrians of your plan to change lanes, allowing them to adjust their actions accordingly. This contributes to a safer driving environment and demonstrates responsible driving behavior.

The other choices do not promote safety. Accelerating quickly can make it difficult to gauge the positions of other vehicles and increases the risk of losing control. Changing lanes without checking mirrors neglects essential safety checks that could prevent collisions with vehicles in your blind spots. Simply looking ahead fails to take into account the critical need to be aware of your surroundings, including both adjacent lanes and vehicles. Overall, signaling is a fundamental step that ensures both you and others on the road remain informed and safe during lane changes.