Abstract: The present principles allow the owners of parking spaces in a barrier gate controlled parking garage to temporarily make the parking spaces available to other users during the periods that the parking spaces are not used by the owners. The parking space owners may publish and made known the availability information of the parking spaces using their associated mobile computing devices through the internet. In addition, a universal barrier gate interfacing device and/or a universal access card are provided which would allow controlling of the operation of different kinds of barrier gate systems via a verification of a universal access code representing the agreed to parking transaction and/or parking space seeker.