Royal Interurban Express

The Royal Interurban Express (Atlantic: Traeiluás Rhiaenntrefola Brenna, TRTB) is a state-owned network of high-speed interurban passenger trains connecting all medium to large cities on the main island of the Kingdom of Atlantica Alba. It consists of 17 routes, all either originating or terminating at or passing through Milo, Atlantica Alba's national capital and most populous city.

The Royal Interurban Express is maintained and operated by the national Ministry of Transportation, which owns all Royal Interurban Express tracking, engines/locomotives, other rolling stock, and road vehicles. The Royal Interurban Express has its promotional, business and operational headquarters at Milo Central Station, the hub of all public transit, taxi and bus transportation in the city of Milo and its metropolitan area, as well as the boarding stop for six Royal Interurban Express passenger lines (lines 101, 102, 103, 110 111 and 113).