This document discusses railway signalling systems. It begins with an introduction to the author Arun Kumar Sharma and his background and qualifications. It then provides an overview of different types of railway signals including fixed signals like semaphore and colour light signals, as well as subsidiary signals like calling-on and repeater signals. The document notes that signals are needed for the absolute and automatic block systems and explains that the physical appearance of a signal is called its aspect while the information it conveys is called its indication.

1. SIGNALLING SYSTEM

2. ‣Hometown- Jaipur
‣Schooling - JNV SAWAI
MADHOPUR
‣Graduation- B.tech Civil
Engineering from NIT
KURUKSHETRA ( 2017)
‣UPSC ESE 2018 - AIR 24
‣GATE 2018 - AIR 97
‣Currently under training in Indian
railways as an IRSE- probationer.
ARUN KUMAR SHARMA
Telegram : shiksha_path

3. INTRODUCTION RAIL AND SLEEPER
TRACK FOUNDATION GEOMETRIC DESIGN POINTS AND CROSSING
ELASTIC FASTENINGS
TRACTIVE SYSTEM SIGNAL MISCELLANEOUS
GAUGE AND WHEEL
YARDS

4. Why do we need signals?
‣Absolute block system
System of working

5. ‣Automatic block system

6. Aspect and indication
‣Aspect - The physical appearance of a signal as seen by a
driver is called the ‘aspect of a signal’.
‣Indication - The information the aspect of signal conveys is
called the indication.

7. Classification of signals

9. Fixed signals

10. Fixed signals
‣Semaphore signal - Lower quadrant

11. ‣Lower quadrant + warner

12. ‣Semaphore signal - Upper quadrant

13. ‣Colour light signal
Fixed signals

14. Fixed signals
‣Stop signals

15. ‣Shunt signal - Used for shunting purposes and not
applicable to a running train.
Subsidiary signals

16. ‣Calling-on signal - used when the main home signal fails,
and in order to receive a train.

17. ‣Repeater or co-acting signal - A Signal placed in rear/below of a
fixed signal for the purpose of repeating the aspects of fixed
signal.

18. ESE-2001

19. ESE-2006

20. Track circuiting
‣To indicate the presence of a train on the track.

21. shiksha_path
Highway Engineering
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