I was thinking about small-time travel today and wondering if there would be a way to implement small, affordable vehicles for the have-nots. Yes, vehicles are for the rich, but it seems as though some form of small personal transport vehicles would exist as well. Something affordable, ugly, and slow, but perhaps something that could be at least used in the express tubes to move up and down between Red and Gold.
These vehicles would be electric, easily broken and stolen, could have parts taken off of them with anyone with rudimentary auto tech. A golf-cart, scooter, or hover-board would need to be charged, and would either not hold enough charge to make it all the way to and from Green, or wouldn't be let into the area because it is not a "motor vehicle." This would keep Green level exclusive.
Perhaps a new business could be opened? It could be a "charging lot" for golf-carts where you rent a space by the day. This would afford you a little extra security,( not that it would stop everyone) and you could charge up while not using the vehicle.
Anyways, just some thoughts I had.