This paper is entitled “Signalling Installations in New South Wales.” It deals chiefly with the general practice outside the electrified area, and any features peculiar to that section have been omitted, as it is considered that the matter is far too comprehensive to be dealt with in a single paper such as this. However, the matters referred to herein also apply, in the main, to the electrified area.
Signal Engineering is the term applied to the design, construction, installation and maintenance or all forms of signals and associated equipment. The object of any signalling system is to permit the safe passage ok trains at the maximum possible speed. This is achieved by conveying to the driver the necessary indications to in- form him of the condition of the track ahead. The type and density of traffic, therefore, determine the systems of signalling required.
The safety provided 1sevents accidents and permits an increase in the track capacity, and where automatic signalling is installed, obviates the necessity for staff being stationed at regular intervals to control traffic. These advantages, in addition to the time saved by avoiding delays to traffic, reduction of standing time, and saving in wages of train crews, more than justify the expenditure involved in the provision of a complete signalling system, which is, in fact, a real economy.