What is prohibited when a vehicle is stopped at intersection or at a crosswalk, marked or unmarked, for a pedestrian?

• Overtaking and passing that vehicle
  Explanation:

  "U.S law prohibits you from overtaking and passing a vehicle that is stopped at a crosswalk so that a pedestrian can cross the roadway."
• Coming to a complete stop before that vehicle
• Avoiding the horn to make the pedestrian cross faster
• None of the above