Lane numbering is defined by which perspective?

• A. From the far left to far right side of the highway
• B. From left to right, as viewed from the flow of traffic
• C. From the center lane outward
• D. From the right to left from the driver's view

Answer: (B)

Lane numbering uses the driver’s view in the direction of travel. You start with the leftmost lane you see in the direction you’re moving and count toward the right, so the leftmost lane in that direction is lane one and numbers rise as you move right. This keeps numbering consistent for each direction of travel because each direction has its own set of lanes. Counting from the far left to far right across the road without regard to travel direction, or starting from the center or from the right, would misalign the numbers for drivers approaching exits or merges. So lane numbering is from left to right as viewed from the flow of traffic.