From the publisher's website:

Are you an experienced trucker looking for more challenge and advanced technologies? Are you a player looking for more control and interaction? Are you a fifth wheel that didn’t get to play? Or do you just want more fun and destruction? Then this expansion is for you. It consists of several parts that can be used separately or in combination to enhance your flights across the galaxy. New Technology Ship building components with new and hitherto unheard of technology, as well as figures and specialization cards for a new alien species. Fifth Wheel Pieces and rules for 5-player games. New Ship Classes Boards and special rules for ships of Class IA and IIA. Evil Machinations New adventure cards that players put into the deck themselves to keep things interesting for their fellow truckers. Rough Roads Brutal cards that can turn your transgalactic pleasure cruise into a trip through Hell. Bonus cards A few special adventure cards to spice up the original set.