What color lines separate traffic moving in opposite directions?

Yellow lines are used to separate traffic moving in opposite directions. This color coding is crucial for traffic safety, as it provides clear visual guidance to drivers about which lanes are designated for oncoming or conflicting traffic. The use of yellow lines helps to prevent head-on collisions by clearly marking the center of the roadway, ensuring that drivers remain in their lanes and are aware of the potential for oncoming vehicles.

In contrast, red lines, white lines, and black lines serve different functions on the road. Red lines often indicate no-stopping zones or similar restrictions, white lines typically define lanes for traffic moving in the same direction or mark parking spaces, while black lines may simply refer to the road surface itself without indicating any traffic rules. Thus, the use of yellow lines is essential for maintaining safe and effective traffic flow between opposing directions.