The Hackney ADS (Auto Deploy Staircase) was created to provide safe access to and from the apparatus roof. The system is fully multiplexed, which allows deploying or stowing of the staircase with the push of a button. The staircase angle and step widths provides comfortable climbing and descending. The system includes safety interlocks to prevent the apparatus from being moved when the staircase is deployed. In addition, the staircase is equipped with side zone LED warning lights and an audible alarm to insure safe deployment in the hazard zone. Best of all, unlike staircases that are recessed into the rear of the body, the Hackney ADS consumes no valuable storage space within the body. And, access to the rear extrication tool compartment is not obstructed permitting full access and utilization of the compartment even while the staircase is actively being used by other emergency crew members. Deployment and stowage is accomplished in under 30-seconds.