The oper­a­tor of a bicy­cle emerg­ing from an alley, dri­ve­way or build­ing shall, upon approach­ing a side­walk or the side­walk area extend­ing across any alley­way, yield the right-of-way to all pedes­tri­ans approach­ing on the side­walk area, and upon enter­ing the road­way shall yield the right-of-way to all vehi­cles approach­ing on the roadway.