They are maintained but they haven't been refurbished like painted and new seats etc. its all the same. I saw a post a while back of someone who provided picture evidence of the insides of the monorails. mold, peeling paint, water damage etc. I am saying they should fix this it wouldn't take long. The monorail ride systems are taken care of well. thats what the trains are still here. In the past two years at least I have not heard or seen and trains go down for a refurb. I do not know the specific schedule nor do i need too refurbishment schedules are not like a monthly thing. I am talking about something going down for a month to get fixed up. For example the Astro orbiter is down right now it has not been refurbed in a long time they are taking a part the entire thing and fixing, painted, rebuilding parts to it. Also with the monorails its hard to take them down because they run every day of the year almost all day long.