Evaluation of relative merits/demerits of different signaling schemes used at a railway station for an approaching train in Indian Railways today
TL;DR: The different signaling schemes used currently and in the recent past by Indian Railways are examined from the point of view of information that they present to the train driver and the impact that it has on total throughput.
Abstract: Indian Railways, one of the largest railway networks in the world today, has a peculiarity that a station exists almost every 5-7 km. Most trains do not stop at all stations and run through more stations than they stop at. The speed at which the trains run through the stations, therefore, is a crucial parameter that determines the run time of a train through a section and, hence, the total throughput (or carrying capacity of the railways). Indian Railways uses several signaling schemes to enable movement of trains in a safe manner. The signaling schemes play an important role in determining the action of the driver in terms of slowing down of trains and, consequently, on the throughput of the railway system. This paper examines the different signaling schemes used currently and in the recent past by Indian Railways from the point of view of information that they present to the train driver and the impact that it has on total throughput. The signaling schemes are compared using total signal entropy presented to the driver at each stage. Apart from theoretical computation of signal entropy, results of some experiments conducted to obtain the impact of signaling schemes on run time of trains are also presented.
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01 Oct 1986
TL;DR: Digital communication systems, Digital communication systems , مرکز فناوری اطلاعات و £1.3bn €2.5bn ¬2.2bn will be spent on research and development of digital communication systems in the next five years.
Abstract: Digital communication systems , Digital communication systems , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
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01 Jan 1983
TL;DR: In this paper, the author gives prominence to railway technology, some of the areas treated applies to both road and rail bound transport and some to road transport only, and some unexplored possibilities.
Abstract: Although the author gives prominence to railway technology, some of the areas treated applies to both road and rail bound transport and some to road transport only. These areas are as follows: route capacity - laws for vehicle following (lane capacity, car-following theory, automatic vehicle systems), problems of congestion - traffic regulation (statistical aspects of car-following behaviour, traffic waves), computer aids to operation - traffic surveillance and control (split cycle and offset optimisation technique: scoot, control of cascaded vehicles), measurement of power - analogue computing (application to strings of vehicles), vehicle identification (bus electronic scanning indicator), interlocking - sequence control (control of intersections - automatic half barriers), control of acceleration and power (automatic transmissions), control of braking, steering - directional stability, some modern rapid transit lines (guided transport, recently constructed underground railways, intermediate systems, light electric vehicles - Tyne and Wear system, pneumatic-tired systems, innovative - fully automated systems), and possibilities for the future including small vehicles under computer control, intercity transport: high-speed rail, new forms of urban and intercity transport, air-cushion transport, linear induction motore, linear synchroneous motors, electro-magnetic support and guidance (attraction mode), magnetic support and guidance -the repulsion (electrodynamic) system, and some unexplored possibilities. (TRRL)
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