Centralized traffic control and train control of the B. & O. railroad

CENTRALIZED traffic control systems concentrate at one point under the direction of one operator the control of train movements over a long section of track, and expedite the movement of traffic in that section. This is accomplished by bringing within view of the operator, indications as to the location of trains and the position of all switches and controlled signals, and also by bringing within his reach means whereby he is enabled to change, when safe to do so, the position of switches and signals affecting the movement of trains.