Abstract: Modular units are disclosed for storing a single bicycle or the like in an individual locker. Each locker provides a volume which is trapezoidal-shaped in cross-section and includes a top wall connected to an end wall and a pair of side walls with the floor, ground, or other substrate forming the bottom wall. A door and door locking post are provided for each locker to enable it to be selectively opened or closed for a fee which may be collected by a coin operated mechanism in the door locking post. These units may be individually arrayed or arranged in linear or arcuate paths with variations in the individual units to interconnect such units in the desired array. According to this invention, a structure is provided for storage of a single bicycle in an individual locker with improved security and protection from the elements using parts which are interchangeable in different units of such structure.