Wis. Stat. § 346.075: Overtaking certain vehicles and devices.

(1) The operator of a motor vehicle overtaking a bicycle, electric scooter, or electric personal assistive mobility device proceeding in the same direction shall exercise due care, leaving a safe distance, but in no case less than 3 feet clearance when passing the bicycle, electric scooter, or electric personal assistive mobility device, and shall maintain clearance until safely past the overtaken bicycle, electric scooter, or electric personal assistive mobility device.

(2) Except as provided in s. 346.48, if the operator of a motor vehicle overtakes a motor bus which is stopped at an intersection on the right side of the roadway and is receiving or discharging passengers, the operator shall pass at a safe distance to the left of the motor bus and shall not turn to the right in front of the motor bus at that intersection.