Betty is a Valvodian Ultra Freight Smartship made to look like 1974 Kenworth W900 semi-truck with cartoon rockets strapped to nacelles on each side of her trailer.
Her interior is laid out like a classic semi cab with cutting edge Valvodian navigation and operational systems with four-dimensional haptic touch computer holoscreens inlaid upon faux wood and vinyl dashboard right next to analog dials switches and pulls.
The rest of the ship is trans-dimensional like the TARDIS it has four main decks and a few lower decks including the engine room. The cargo bay is where most of the trans dimensionality exists it theoretically can never be full.
First Appearance – Ace Tucker Space Trucker 1