On a rail transport system, signalling control is the process by which control is exercised over train movements by way of railway signals and block systems to ensure that trains operate safely, over the correct route and to the proper timetable. Signalling control was originally exercised via a decentralised network of control points that were known by a variety of names including signal box, interlocking tower and signal cabin. Currently these decentralised systems are being consolidated into wide scale signalling centres or dispatch offices. Whatever the form, signalling control provides an interface between the human signal operator and the lineside signalling equipment. The technical apparatus used to control switches (points), signals and block systems is called interlocking.
The Quintinshill rail disaster was a multi-train rail crash which occurred on 22 May 1915 outside the Quintinshill signal box near Gretna Green in Dumfriesshire, Scotland. It resulted in the deaths of over 200 people, and is the worst rail disaster in British history.
In railroading, a derailment occurs when a rail vehicle such as a train comes off its rails. Although many derailments are minor, all result in temporary disruption of the proper operation of the railway system and they are a potentially serious hazard.
The Clapham Junction railway crash occurred on the morning of 12 December 1988, when a crowded British Rail passenger train crashed into the rear of another train that had stopped at a signal just south of Clapham Junction railway station in London, England, and subsequently sideswiped an empty train travelling in the opposite direction. A total of 35 people died in the collision, while 484 were injured.
The Colwich rail crash occurred on the evening of Friday 19 September 1986 at Colwich Junction, Staffordshire, England. It was significant in that it was a high speed collision between two packed express trains. One driver was killed, but no passengers died because of the great strength of the rolling stock involved, which included examples of Mk1, Mk2 and Mk3 coaches.
The Hawes Junction rail crash occurred at 5.49 am on 24 December 1910, just north of the Lunds viaduct between Hawes Junction and Aisgill on the Midland Railway's Settle and Carlisle main line in Westmorland, England. It was caused when a busy signalman, Alfred Sutton, forgot about a pair of light engines waiting at his down (northbound) starting signal to return to their shed at Carlisle. They were still waiting there when the signalman set the road for the down Scotch express. When the signal cleared, the light engines set off in front of the express into the same block section. Since the light engines were travelling at low speed from a stand at Hawes Junction, and the following express was travelling at high speed, a collision was inevitable. The express caught the light engines just after Moorcock Tunnel near Aisgill summit in Mallerstang and was almost wholly derailed.
The Abermule train collision was a head-on collision which occurred at Abermule, Montgomeryshire, Wales on 26 January 1921, killing 17 people. The crash arose from misunderstandings between staff which effectively over-rode the safe operation of the Electric Train Tablet system protecting the single line. A train departed carrying the wrong tablet for the section it was entering and collided with a train coming the other way.
Over the latter years of the 19th and early years of the 20th centuries, Penistone in Yorkshire gained a name as an accident black-spot on Britain's railway network; indeed, it could be said to hold the title of the worst accident black-spot in the country. The main line through the town was the Woodhead route of the Manchester, Sheffield and Lincolnshire Railway between Sheffield Victoria and Manchester, London Road. The line was heavily graded with a summit some 400 yards inside the eastern portal of the Woodhead tunnel.
Rule 55 was an operating rule which applied on British railways in the 19th and 20th centuries. It was superseded by the modular rulebook following re-privatisation of the railways. It survives, very differently named: the driver of a train waiting at a signal on a running line must remind the signaller of its presence.
The Winwick rail crash took place at Winwick Junction, near Warrington on the London, Midland and Scottish Railway, on 28 September 1934. Two trains collided, resulting in 11 deaths and 19 injured.
The Darlington rail accident occurred on the evening of 27 June 1928 when a parcels train and an excursion train collided head on at Darlington Bank Top railway station in County Durham, England. The accident was caused by the parcels train driver passing a signal at danger, due to misunderstanding the signalling layout in an unfamiliar part of the station. This accident resulted in the deaths of 25 people and the serious injury of 45 people.
The Connington South rail crash occurred on 5 March 1967 on the East Coast Main Line near the village of Conington, Huntingdonshire, England. Five passengers were killed and 18 were injured.
The Abbots Ripton rail disaster occurred on 21 January 1876 at Abbots Ripton, then in the county of Huntingdonshire, England, on the Great Northern Railway main line, previously thought to be exemplary for railway safety. In the accident, the Special Scotch Express train from Edinburgh to London was involved in a collision, during a blizzard, with a coal train. An express travelling in the other direction then ran into the wreckage. The initial accident was caused by:
The Grantham rail accident occurred on 19 September 1906. An evening Sleeping-Car and Mail train from London Kings Cross to Edinburgh Waverley hauled by Ivatt 'Atlantic' No 276 derailed, killing 14. The accident was never explained; the train ran through Grantham station, where it was scheduled to stop, and derailed on a set of points on a sharp curve at the end of the platform, which at the time had been set for a freight train. No reason was ever established as to why the train did not stop as scheduled, or obey the Caution and Danger signals. Rolt (1956) described it as "the railway equivalent of the mystery of the Marie [sic] Celeste".
Wrawby Junction is a busy railway junction located a short distance west of Barnetby, North Lincolnshire, England and controls the confluence of the Network Rail routes from Lincoln, Retford and Scunthorpe towards Immingham and Cleethorpes. The junction was controlled by a large signal box of part-brick, part-wooden, construction and is now controlled from York Rail Operating Centre (ROC).
The Wrawby Junction rail crash was a train crash which occurred on 9 December 1983, at Wrawby Junction, near Barnetby station, North Lincolnshire, England.
The Battersea Park rail crash occurred on 2 April 1937, just south of Battersea Park railway station on the Southern Railway, in London. Two electrically driven passenger trains collided on the Up Local line; the second train, from Coulsdon North to Victoria, had been allowed into the section while it was still occupied by the first train, from London Bridge to Victoria. The signalman at Battersea Park, G. F. Childs, believing there was a fault with the Sykes electromechanical interlocking apparatus which was installed at the box, had opened up the case of the instrument and inadvertently cleared the interlock which should have prevented this situation. The official enquiry ruled that he subsequently accepted the Coulsdon train, although he should have been aware that the London Bridge train had not cleared the section. Ten people were killed, including the guard of the London Bridge train, and eighty people were injured, seven sustaining serious injuries. Another accident had occurred at Battersea Park in 1881.
The Kirtlebridge rail crash took place in 1872 at Kirtlebridge railway station in Dumfriesshire. An express passenger train ran into a goods train that was shunting; 11 people lost their lives immediately, and one further person succumbed later. The cause was a failure to communicate between the station master in charge of the shunting operation, and the signalman. There was not full interlocking of the points, and the block system of signalling was not in use.
