<P> The Monorail Shop also has a painting room located on Beam 10 that is elevated 25 feet (7.6 m) off the ground and has a lift mounted on the wall for the painters . It takes three weeks to paint a monorail train . To access the wheels and underside of the monorail, a portion of Beam 1 inside Shop is removable, primarily used to change load tires . </P> <P> The diesel - powered "work tractors" are the tow trucks of the system, and can tow a train to Monorail Shop, located around the bend from Space Mountain . Monorail Operations at the Walt Disney World resort has three separate tractors (Red, tagged' 1', Blue, tagged' 2', and Green, tagged' 3') that allow for the simultaneous towing of three different monorails . In the event of a power failure on one of the monorail lines, the tractors are still operational, as they are powered by on - board diesel engines . </P> <P> Safe train spacing is maintained via a moving blocklight system, referred to as MAPO, installed in the cab of each train . MAPO appears in the top center of the pilot's console and looks similar to a horizontal stop light . There are three lights--green, amber, and red--and a push - button labeled "Override". The term "MAPO" itself comes directly from Walt Disney, who formed a new company to deal with Disneyland's transportation system directly from the profits made by Mary Poppins . </P> <P> Each monorail beam is divided into blocks based upon pylon numbering . The currently illuminated MAPO color indicates how far ahead the leading train is currently located . A green MAPO shows that the leading train is 3 or more blocks ahead, amber means 2 blocks ahead, and red indicates that the next train is in the very next block . A block is roughly between 500 and 1000 feet (about 150 and 300 m) long, although this varies . The start of each block is called a "hold point", as pilots may need to hold their trains at that location until the train ahead moves away . Guests riding in the front cab of a monorail can identify hold points by the yellow reflective tape around a pylon's number and by two yellow reflectors attached to the top outside edges of the monorail beam at that pylon . </P>

Where does the monorail go in disney world