The utilidors have been referred to as an "underground city", the functions of which include:Waste removal: The Magic Kingdom uses an automated vacuum collection (AVAC) system for waste removal. Custodians remove trash from the park twenty-four hours a day, then dump it into AVAC system processors throughout the park. The trash then travels through pneumatic tubes to a central location where it is processed and compressed for transfer to a landfill or recycling plant. Electrical operations: The park's computer system, the Digital Animation Control Systems (DACS), is operated and monitored from control rooms in the utilidors. This system monitors everything in the park, from sound systems to attractions, Audio-Animatronic figures to parades, fire prevention and security systems to cash registers.
Deliveries and storage warehouses: Deliveries are received, processed, and stored at the utilidors until use. This ensures that guests do not see delivery trucks, nor do they see cast members carting merchandise through the park.
Food service: The park's cooking and prep kitchens are housed in the utilidors.
Costuming: For years, the park's costuming department (for cast members and Audio-Animatronic figures) was located in the utilidors. Over 1.2 million costumes were housed here, making it the largest operating wardrobe department in the world. In 2005, Disney replaced this facility with a larger location in the cast member parking lot.
Cast member services: Separate locker rooms for men and women are located in the utilidors, as well as cast member cafeterias. There is also a check cashing service, an employee hair salon called "Kingdom Kutters," rehearsal rooms, and administrative offices.
Emergency services: Two medical carts are housed in the utilidors and are deployed whenever there is a medical emergency in Magic Kingdom.