Currently, not much is known about the monorail other than that it was declared by Chris Roberts within the early stages of Star Citizen's development plan. However, Chris had wrote something about the monorail as it hits the $24 million mark.
|“|| Public Transportation System – Need to get from one place to another but don’t have a starship? We’re building a galactic transportation system. You can travel via transport from system to system in Star Citizen and even ship items (like a ship you need moved to another hangar.) With this stretch goal, we’ll expand this system: star liners, long range transports, charter ships and flyable shuttles!
Pictured here is a monorail car, which will be used by the player to travel from place to place on Terra! A public transportation system may not seem as sexy as a new bomber or a cruiser, but it speaks directly to the goal of making Star Citizen an immersive, world-building experience. Instead of having a simple ‘fast travel’ option like an MMORPG, Star Citizen will feature a living, breathing system to support that gameplay requirement… a system that will be impacted by the economy and player actions in all sorts of exciting ways!
–Chris Roberts on October 12, 2013