The report examines the part that control plays in the operation of a rapid transit railway, and a particular operating concept is recommended. The overall requirement calls for a finer degree of control than exists in present systems along with improved devices and equipment. The recommended system employs mostly existing concepts but does require development of some advanced equipment designs. Specifications describing the functional requirements of a train control system are given. These specifications, together with appropriate contractual requirements and engineering plans and data, can be used as a basis for preparing the detailed specifications for procurement of the control system for the proposed National Capital Rapid Transit System. Requirements that are recommended for inclusion in the preparation of specifications for prototype and production-model transit cars are set forth. Continuing effort should be exercised by the National Capital Transportation Agency to observe and keep pace with the advances being made in the field of transit car component development, e.g., trucks, motors, motor controls, body framing and materials, springing, air conditioning, heating, etc., so that when the time arrived for the specifications to be prepared, the latest advances may be incorporated.


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