Yellow directional dividing lines separate traffic travelling in opposite directions.
White line markings are used to separate traffic travelling in the same direction.
Freeway lanes, as well as some city street lanes, which are ending will usually be marked by double wide lines painted on the pavement. If you are driving in a lane marked with double wide lines, be prepared for the lane to end. You will have to exit the freeway, turn at the next intersection, or merge. Look for signs.
Vehicle A may pass if the road is clear ahead and behind.
Vehicle A must not pass or make a left turn between intersections.