The right difficulty switch must be set to the A position. This increases the car's maximum speed. The player is free to select A or B position for the left difficulty switch. In the left's B position, oncoming cars honk just before they enter the screen. In the A position, oncoming cars do not honk.
Old rules edited 29 Aug 2018 The Left Difficulty Switch May Be Set To The A or B Setting. The Right Difficulty Switch MUST Be Set To The A Setting.