Final answer:
The lines separating traffic moving in opposite directions are yellow, with yellow indicating opposing traffic flows and white lines for the same direction of travel.
Step-by-step explanation:
The color of the lines separating traffic moving in opposite directions is yellow. These lines are important as they guide drivers and help maintain safe driving conditions. For example, in the context of road safety, observing the color of the traffic lines can explain whether it is safe to pass or if you must stay in your lane. Lines colored yellow usually indicate opposing traffic flows, while white lines separate traffic moving in the same direction. Understanding these basic traffic rules is crucial for the safety of both pedestrians and drivers.