76.06 EMERGING FROM ALLEY OR DRIVEWAY.
   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 said sidewalk or sidewalk area, and upon entering the roadway shall yield the right-of-way to all vehicles approaching on said roadway.
(Code of Iowa, Sec. 321.236[10])