Answer
Yellow lines
Step-by-step explanation
Yellow lines separating lanes divide opposite directions of traffic. If there is a yellow line on one side then on the other side traffic is coming. Traffic is coming towards you on one side in the case if there is a yellow line on the other or opposite side. White lines separating lanes of traffic which are moving in the same direction. The yellow line is an indicator of traffic in the opposite directions and white line for the same direction.