High-speed elevators in the Tower and in the Garden / Parking Garage provide passenger service. 400 Northpark also has elevators that serve the motor court and floors one and two of the retail bridge. Each building has a service elevator in the tower which serves basement through Level 18. 400 Northpark and 500 Northpark also have a service elevator in the garden which serves all levels of garden offices and garden rooftop.Elevators in the Parking Garage operate 24 hours per day, seven days per week. To access the main lobby from 400 Northpark, take the parking elevators to Level B, proceed to motor court and then through the revolving doors. Lobby access for 500 and 600 Northpark is available on Level D. Elevators in the Tower are secured after regular business hours. Customers must present a valid access card to use elevators during these times.