(1) Any person operating a bicycle shall obey the instructions of official traffic control devices applicable to vehicles, unless otherwise directed by a police officer.

(2) Whenever authorized signs are erected indicating that no right or left or U-turn is permitted, no person operating a bicycle shall disobey the directions of any such sign, except where such person dismounts from the bicycle at the right-hand curb or as close as is practicable to the right edge of the right-hand shoulder to make any such turn, in which event such person shall then obey the regulations applicable to pedestrians.