This question tests a candidate's understanding of California road markings, specifically the rules for passing when there are solid and broken yellow lines on the road. In California, a solid yellow line indicates that passing is not allowed if you are traveling next to that line, whereas a broken yellow line allows passing. This is a primary rule that is crucial for safe driving as it defines where overtaking maneuvers can be conducted safely without compromising oncoming traffic. The rule is stated in the California Driver Handbook, which mandates the different interpretations of lane markings for traffic safety.