If there's a slow-moving vehicle in your lane on a four-lane highway, what is required before changing lanes?

When changing lanes to safely overtake a slow-moving vehicle on a four-lane highway, several important actions must be taken to ensure the safety of all roadway users. Signaling for at least 50 feet in advance is essential, as it informs other drivers of your intention to change lanes, allowing them to adjust their speed or position accordingly.

Checking the blind spot is critical to ensure that there are no vehicles or objects that may be hidden from your mirrors, preventing potential collisions. Finally, ensuring sufficient space in traffic helps to confirm that you have ample room to maneuver into the next lane without interfering with other drivers.

By conducting all these actions, you reduce the risk of accidents and promote a safer driving environment. Therefore, the requirement is not merely one of these actions, but all of them collectively contribute to a safe lane change.