Uk railway signalling

4)Explain Route control chart /table of control /Selection table with each column? ANS) As it will be cumbersome to prepare the signaling circuits directly from the signal interlocking plan (SIP). The various safety aspects such as interlocking of conflicting routes, requirements of points for each route, the track circuit controls for the points, the route holding requirements such as approach locking and back or route locking and other controls such as crank handle controls, gate controls, block control and overlap release, etc. are first put in a table called “control table.” Or “selection table” and this table is used in the preparation of circuits. It specifies the routes on which the train can be travel without any collisions/derailments . An interlocking system implements this control table making sure that the running of trains in safe.   Control table for interlocking system in Indian Railways is done by a private companies like Siemens, kyosan,hitachi,medha servo etc....

The first railway semaphore signal was erected in 1841 at New Cross Gate by Charles H Gregory, Engineer of the London & Croydon Railway. During daylight hours, a semaphore signal conveys its indications by a pivoted 'arm'. The arm projects to the left of the post when viewed in the applicable direction of travel, and its angle determines the indication. The first semaphores were three-position signals, used in conjunction with the time interval system. The 'danger' indication was given by the arm being in the horizontal position  [2.1] . When in this position, a red light was shown at night. For the 'caution' indication, the arm was lowered through 45°, and a green light was displayed at night  [2.2] . In the 'clear' position, the arm dropped down vertically to be hidden inside a slot in the post, and a white light was shown at night  [2.3] . By the 1860s, semaphore signals were in widespread use, apart from on the Great Western Railway and the Londo...

  Why we are using signals in railways? Railway signals are used to ensure the safe movement of trains and prevent accidents. They provide information to train operators about the conditions ahead and guide them on when to stop, proceed, or slow down. Here are some of the key reasons why signals are used in railways: Preventing collisions :  Signals are used to prevent collisions between trains, by indicating when it is safe for a train to proceed, and when it needs to stop. Regulating train speed:   Signals regulate train speed by indicating the maximum permissible speed at a given point, ensuring that trains do not exceed safe speeds. Managing train movements :  Signals help to manage the movements of trains on a railway network, ensuring that trains are routed to the correct destination and are not held up unnecessarily. Providing information to train operators :  Signals provide information to train operators about the condition of the track ahead, such as w...

What is railway signaling Railway signaling refers to the system of communication and control devices used to manage train movements and ensure safety on railways. The primary goal of railway signaling is to prevent train collisions, derailments, and other accidents by controlling train speeds and movements. Railway signaling typically includes a combination of fixed signals (such as lights or flags) and movable signals (such as switch points) that are controlled by a central control system. The signals indicate to train operators when it is safe to proceed, when to slow down or stop, and when to change tracks. The signaling system may also include track circuits, which detect the presence of trains on the tracks, and interlocking devices, which ensure that switches and signals are properly aligned before a train can proceed. Railway signaling is a critical component of railroad operations, and its design and implementation must adhere to strict safety standards and regulations.