Bhubaneswar, Jan 30 (LocalWire) The last mechanical signal with arms in East Coast Railway (RCoR) at Tureikela station will be removed on Thursday.
“The last Mechanical Signal with Arms (without Multiple Aspect Colour Lights) is being removed / taken out of service,” said an official release on Wednesday.
These signals with arms are called Semaphore Signals.
This marks a complete shift to Modern Signalling System.
The last such Semaphore Signal is now at Tureikela Road Station near Kantabanji in Balangir district, Odisha; which is being removed and being replaced by Modern Multiple Aspect Colour Lights Signalling.
Tureikela Road Station is situated about 50 km away from Titilagarh station on the important Titilagarh-Raipur Railway Line.
The advantage of colour-light signalling over semaphore signalling is the higher reliability of electrical control over the signals compared to the mechanical means for operating semaphore signals.
Colour-light Signals do not suffer from distance limitations as semaphore signalling does, allowing signal controls to be placed conveniently together even if the signals themselves are far away.
In addition, the electrical circuitry naturally allows for monitoring, interlocking, and detection of failure conditions, all of which are achievable but far less reliably with mechanical means in semaphore signalling.
In colour-light signals, a junction route indicator or directional type route indicator is commonly used to indicate diverging routes.
This consists of an additional set of 5 lunar white lamps in a row at an angle, attached to the main signal.
The angle of the junction route indicator corresponds in a rough manner to the angle made by the diverging route.
When these additional lamps are lit, they indicate that the signal applies to a diverging route.
Otherwise, the signal is taken to apply to the main route.