Final answer:
When a road is narrowing from a multi-lane to a single lane, drivers should merge safely into the adjacent lane.
Step-by-step explanation:
When a road is narrowing from a multi-lane to a single lane, it is important to merge safely to avoid accidents. Drivers in the furthermost lane should check their mirrors, signal their intention to merge, and yield to cars in the other lanes. They should then merge into the adjacent lane, allowing the traffic to flow smoothly.