What should a driver consider when deciding to change lanes?

When changing lanes, it is essential for a driver to use their turn signals. This action serves multiple critical purposes. First, signaling informs other road users of your intention to change lanes, which enhances overall safety and helps prevent accidents. It allows drivers behind and alongside you to anticipate your movement, creating a smoother flow of traffic. Additionally, using turn signals is a legal requirement in many jurisdictions, reinforcing the necessity of this practice for responsible driving.

The other choices do not directly address the responsibilities and considerations involved in changing lanes. While traffic light colors are crucial for managing intersections and overall traffic flow, they do not pertain specifically to a lane change. Considering other drivers' impressions may influence a driver’s confidence but is not a practical or necessary factor in the decision to change lanes. Lastly, while monitoring a vehicle's fuel level is important for overall vehicle operation, it is irrelevant to the act of changing lanes. Thus, using turn signals stands out as the most relevant and responsible consideration when altering a vehicle's position on the road.