As you all should know, the School Bus is a car originally planned for GTA III, but people were complaining about the killing of children in the game (Even though there was never evidence that there were kids even planned there, other than a short sentence in their website), they decided to remove it, to replace it from a similar looking bus, called the Bus, this mod relives the old bus, and even has good signs on it.
I ALWAYS See it in Staunton Island Dunno Why I didn't install a mod. PS. I Saw This Bus In GTA Vice City And Saved it into the garage.
Rockstar Games are ThE BEST