When changing lanes, what must you do?

When changing lanes, it is essential to signal your intentions and check for traffic to ensure it is safe to do so. This practice promotes safety for yourself and other road users. Signaling indicates to others that you plan to change lanes, allowing them to adjust their speed or position if necessary. Additionally, checking for traffic involves looking in your mirrors and over your shoulder to ensure there are no vehicles in your blind spot. This multi-step process helps prevent accidents and enables smoother traffic flow. Effective lane changing requires clear communication and awareness of your surroundings, which is crucial for maintaining road safety.