From the back of the book:
In the universe there are countless planets to explore and the best way to do so is by using a vehicle. Within this book there are rules for creating your own designs, from primitive chariots and galleys to high technology grav cars and trains. The variety possible is endless.
Beside rules for designing your own unique models there are over ninety different vehicles provided within, split into various categories. Aircraft, alnd vehicles, watercraft, grav vehicles and walkers are all represented and able to complete any journey a traveller needs to make.