Flying vehicles
Early stages

I've seen some descriptions in the rooms as you go through the tubes or streets about hovering and flying vehicles so, here're a couple things plus an artist concept as well. :)

Gryrodynes and Aerodynes:

http://www.terrafugia.com/

Also, I'm looking for the original website I found this hover bike on, but in the meantime, here is the video on youtube:

http://youtu.be/BJ5Sn38NYGA

Badlands?

http://freakyfir.deviantart.com/art/Landshark-Hoverbike-427990799