Which type of line separates lanes of traffic moving in opposite directions?

The type of line that separates lanes of traffic moving in opposite directions is a solid yellow line. This line serves a crucial purpose in road safety as it indicates that crossing into the opposing lane is prohibited, helping to prevent head-on collisions. When you see a solid yellow line, it signals that drivers must stay in their respective lanes and avoid passing vehicles going in the opposite direction, thereby maintaining the safety and order of traffic flow.

In this context, solid white lines denote lanes of traffic going in the same direction and indicate that lane changes are discouraged but not illegal. Dotted yellow lines typically allow for passing and indicate that crossing into the opposite lane is permissible when it's safe to do so. Dashed white lines also indicate lanes concerning traffic moving in the same direction but allow for changing lanes. Understanding the function of these different lines is essential for safe driving practices.