Final answer:
The middle lane on a multi-lane road is used for cruising at a steady speed over longer distances, while balancing the purposes of the adjacent lanes.
Step-by-step explanation:
On a road with more than two lanes traveling in the same direction, you use the middle lane for cruising at a steady speed and for longer distances. It serves as a balance between the right lane, which is generally for entering and exiting the road, slower traffic, and turning, and the left lane, which is commonly reserved for passing other vehicles. When driving in the middle lane, it's essential to maintain a safe following distance and be aware of vehicles merging or changing lanes from either side.