An elevator for transporting a person between two floors of a building includes at least one carriage and a lifting system. The elevator includes a control system and door sensors detecting the opening and closing of doors covering a hoist way. The control system detects a first opening and closing of a door in front of the carriage and activates the lift system to move the carriage to an opposite floor. Upon detecting a second opening and closing of a door in front of the carriage, the control system places the lift system in a standby state. Upon detecting a third opening and closing of a door in front of the carriage, the control system again activates the lift system to move the carriage to an opposite floor.