What is meant by the phrase 'lane splitting'?

Answer: B — It refers to two motorcycles driving in the same lane.

Lane splitting refers specifically to the practice of riding a motorcycle between lanes of slow-moving or stopped vehicles, essentially allowing the motorcyclist to maneuver through traffic. This technique is often employed to reduce congestion and improve travel efficiency for motorcycle riders. While two motorcycles riding side by side in the same lane can also occur, lane splitting primarily emphasizes the act of navigating between lanes rather than occupying the same lane collaboratively. The other options present variations of traffic scenarios, but they do not accurately capture the essence of lane splitting. For example, the idea of driving on the line between lanes denotes a different concept, one that does not necessarily include the specific movement between lanes. Additionally, the idea of a car and a motorcycle in the same lane does not pertain to lane splitting as understood in motorcycle riding. Therefore, the most accurate understanding of lane splitting aligns with the scenario of a motorcycle navigating between lanes of traffic.