What is the proper way to change lanes?

The proper way to change lanes is to signal, check mirrors, and look over your shoulder before merging into the new lane. This approach is crucial for ensuring your safety and the safety of other road users. By signaling, you communicate your intention to other drivers, which helps to prevent misunderstandings and potential accidents.

Checking your mirrors allows you to assess the position of vehicles in adjacent lanes, while looking over your shoulder provides a final confirmation that the area is clear and safe for you to proceed. This comprehensive method of checking ensures there are no blind spots, enhancing your awareness of surrounding traffic.

In contrast, changing lanes without signaling can lead to confusion for other drivers and significantly increases the risk of collisions. Not signaling until you are halfway through the lane change neglects the importance of informing others of your intentions beforehand, while accelerating significantly to secure a lane introduces unnecessary danger and can disrupt the flow of traffic. Proper lane-changing technique emphasizes communication and safety, making option A the best choice.