What does a solid yellow line mean?

Answer: A — No passing allowed

A solid yellow line indicates that passing is not allowed in that area. This marking is used to prevent drivers from overtaking other vehicles in situations where visibility may be limited or where it is unsafe to do so, such as on curves or hills. It is a regulatory measure aimed at maintaining safety on the road by clearly signaling to drivers that crossing this line to pass another vehicle is prohibited. This helps to reduce the risk of head-on collisions and ensures that traffic flows more predictably. In contrast, a dashed or broken yellow line would signify that passing is permitted, while other options related to two-way traffic or pedestrian crossings do not pertain to the functions of a solid yellow line.