What do the white arrows in the center lane indicate?

• Vehicles can use this lane for through driving and passing.
• Vehicles must turn right from this lane.
• Vehicles can use this lane to turn left, and should use it with caution as vehicles from the opposite direction may also be using it to turn left.
  Explanation:

  "The white arrows in the center lane indicate that this lane is designated as a two-way left-turn lane. This means vehicles traveling in either direction can use this lane to make left turns."
• Vehicles must stop in this lane.