Pavement Markings Lines and symbols are used on a roadway to warn and direct drivers and to control traffic. Edge are solid lines along the side of the road that tell you where the edge of the pavement is. Lane lines are white lines separating lanes of traffic moving in the same direction. Crossing the line is allowed only when changing lanes or turning. Crossing a solid white line requires special care and is discouraged.
Center lines are yellow lines separating lanes of traffic moving in opposite directions.
Passing is allowed. Two solid lines mark the center of the roadway. Solid yellow lines may be crossed to make a left turn to or from an alley, private road, driveway, or street. No Passing lines are solid yellow lines on roads where traffic moves in opposite directions. The lines indicate zones where passing is not allowed.