What does a yellow line (solid or broken) in the center of a roadway indicate?

A yellow line in the center of a roadway signifies that the road has two-way traffic. It is used to indicate that vehicles traveling in opposite directions must remain in their respective lanes, guiding drivers to stay to the right of the line. When the yellow line is solid, it means that crossing over may be restricted or prohibited, often due to safety concerns such as visibility issues or the presence of oncoming traffic. A broken yellow line, however, indicates that passing is permitted when it's safe to do so. Understanding the marking's role helps ensure safe navigation on roads shared by vehicles heading in different directions.