When driving on a divided highway, what is required before changing lanes?

When changing lanes on a divided highway, the primary requirement is to ensure that the maneuver can be completed safely. This involves several key factors including assessing the speed and distance of other vehicles, checking blind spots, and making sure there is adequate space in the lane you wish to move into. Safety is paramount in driving, and ensuring a clear and safe path before executing a lane change minimizes the risk of accidents.

While signaling your intent, checking mirrors, and being aware of surrounding vehicles are also important parts of changing lanes, the critical factor is that the action must be done safely. If the lane change cannot be done safely, it should not be attempted, regardless of other factors. This foundational principle of road safety reinforces the importance of vigilance and caution when operating a vehicle.