Dallas, Texas. Dallas ZIP Code Map (Uncolored ZIP3s, Borders Only) :: MapTechnica Classic Series. Our US ZIP Code map shows the uncolored ZIP Code borders in and around Dallas, Texas. This map shows major streets, highways and interstates, and can be printed and displayed as a reference map.
North American railroad signals generally fall into the category of multi-headed electrically lit units displaying speed-based or weak route signaling.orth American signals generally follow a common layout. A high signal consists of one to three heads mounted roughly in a vertical stack, each head capable of displaying one to four different aspects. Automatic signals are identified with a number plate whereas absolute signals are not.
Train Facts. 1  Ringling Bros. is divided into two simultaneously traveling unit trains: the Red Unit and the Blue Unit. 2  Each circus train has a designated trainmaster who is responsible for the safe operation and timely movement of the unit train. Each railroad train crew is provided with a circus radio for operational and emergency communications. In addition, the circus trainmaster monitors the carrier railroadÃs radio frequency to be aware of other traffic on the railroad.