Which line type is typically used as the left-edge line on divided highways?

• A. Dashed white line
• B. Solid yellow line
• C. Solid white line
• D. Dashed yellow line

Answer: (B)

On divided highways, the markings show boundaries you must not cross. The line along the left edge of the road is a solid yellow line. The color yellow is used to distinguish boundaries involving traffic in opposite directions, and the solid style signals that you may not cross it. This helps you stay within your lane and away from the median or oncoming traffic. By contrast, the right edge is typically marked with a solid white line, and dashed lines indicate where crossing is allowed in appropriate situations. So that solid yellow left-edge line is the proper cue for the left boundary of the roadway on divided highways.