okay well heres a thing you may be able to (TRY) take a vehicle that holds alot of people putt an engine like the one in the post about the star warz planez so it goes strait up then putt like some sort of objects to make a upward "tunnel" like a sireis of telephone poles going up into the air one ontop of the other you wouldent be able to really stop the elevator tho when it reached the top it would just fall back to the bottom
example of what im talking about
http://www.youtube.com/watch?v=jkO2rEzUJQcit traps the vehicle so it can only go up and down instead of fly off somewere just putt something at the top to stop the vehicle from flying out of the tunnel