Tterrab Industries was a human corporation headquartered in downtown New Mombasa on Earth. A subdivision of the corporation, Tterrab Highway Administration, worked on highways since its corporate symbol, a lower-case "a," is visible on the emergency doors in the highways of the NM 105 E. The name of the corporation is seen printed on the highway signs of the Tsavo Highway. Tterrab Industries may also have worked on Wind Power Station 7 on Zanzibar Island and the abandoned weather station Blackout, as its symbol appears in both levels.