What is a "stop line"?

Answer: B — white line where vehicles must stop before entering an intersection

A "stop line" is defined as a white line painted on the pavement at intersections, indicating where vehicles must come to a complete stop before proceeding. This line is typically located just before the crosswalk or intersection, ensuring that drivers stop at the appropriate location to maintain safety and allow pedestrians to cross safely. By stopping behind the stop line, drivers can also ensure they have a clear view of oncoming traffic and other potential hazards, which enhances overall traffic safety. This regulation helps to coordinate the flow of traffic and helps prevent accidents at intersections. The other options do not accurately describe a stop line. A sign indicating where to yield refers to different traffic controls, while a line marking the end of a lane serves a separate purpose related to lane designations. A warning line for pedestrians could be another type of marking, but it is distinct from the function of the stop line.