Parking Lot Barriers Parking access systems can be defined as a system that does not collect revenue but rather controls access into and out of a parking lot or parking structure. These Parking Access Systems are typically built around a gate operator. Some gate operators are: barrier gates, slide gate operators, and swing gate operators. The gate operators have (2) inputs that must be defined by the installer: the opening input and the closing input. The opening input defines when the gate operator will open and the closing input defines when the gate operator will close. Typical opening input devices are vehicle loops, keypads, proximity readers, card readers, and radio transmitters. Some typical closing input devices are vehicle loops and radio transmitters.Some typical applications for Parking Access Systems: business park lot access, hotel parking lot access, apartment complex access, employee lot access, home owners association access.