 | This article needs additional citations for verification .(October 2012) |
A junction, in the context of rail transport, is a place at which two or more rail routes converge or diverge. The physical connection between the tracks of the two routes (assuming they are of the same gauge) is provided by turnouts (US: switches) and signalling. [1]
In a simple case where two routes with one or two tracks each meet at a junction, a fairly simple layout of tracks suffices to allow trains to transfer from one route to the other. More complicated junctions are needed to permit trains to travel in either direction after joining the new route – for example by providing a triangular track layout. [note 1]
Rail transport operations refer to stations that lie on or near a railway junction as a junction station . In the UK it is customary for the junction (and the related station) to be named after the next station on the branch, e.g. Yeovil Junction is on the mainline railway south of Yeovil, and the next destination on the branch is Yeovil Pen Mill. Frequently, trains are built up and taken apart (separated) at such stations so that the same train can be divided and proceed to multiple destinations. For goods trains (US: freight trains), marshalling yards (US: Classification yards) serve a similar purpose.
The capacity of the junctions limits the capacity of a railway network more than the capacity of individual railway lines. This applies more as the network density increases. Measures to improve junctions are often more useful than building new railway lines. The capacity of a railway junction can be increased with improved signaling measures, by building points suitable for higher speeds, or by turning level junctions into flying junctions, where tracks are grade-separated, and so one track passes over or under another. [2] With more complicated junctions such construction can rapidly become very expensive, especially if space is restricted by tunnels, bridges or inner-city tracks.
The installation of junctions into a rail system poses many challenges, including increased maintenance costs, and problems in on-time performance. Metro rail systems have a rail network design where the number of junctions is minimized. Passengers, and not trains, move from one train station to another.
Stagecoach South Western Trains Limited, trading as South West Trains (SWT), was an English train operating company owned by Stagecoach, which operated the South Western franchise between February 1996 and August 2017.
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 East Coast Main Line (ECML) is a 393-mile long (632 km) electrified railway between its northern terminus at Edinburgh Waverley and southern terminus at London King's Cross station. The key towns and cities of Peterborough, Doncaster, York, Darlington, Durham and Newcastle are on the line. The line is a key transport artery on the eastern side of Great Britain running broadly parallel to the A1 road. The main line acts as a 'spine' for several diverging branches, serving destinations such as Cambridge, Leeds, Hull, Sunderland and Lincoln, all with direct services to London. In addition, a few ECML services extend beyond Edinburgh to serve other Scottish destinations, such as Stirling, Inverness, Aberdeen or Glasgow Central, although the principal London-Glasgow route is the West Coast Main Line (WCML).
Rail transport operations are the day-to-day operations of a railway. A railway has two major components: the infrastructure and the rolling stock
The London, Tilbury and Southend line, also known as Essex Thameside, is a commuter railway line on the British railway system. It connects Fenchurch Street station, in central London, with destinations in east London and Essex, including Barking, Upminster, Basildon, Grays, Tilbury, Southend and Shoeburyness.
In civil engineering, grade separation is a method of aligning a junction of two or more surface transport axes at different heights (grades) so that they will not disrupt the traffic flow on other transit routes when they cross each other. The composition of such transport axes does not have to be uniform; it can consist of a mixture of roads, footpaths, railways, canals, or airport runways. Bridges, tunnels, or a combination of both can be built at a junction to achieve the needed grade separation.
The Wisbech and March line is a railway line between March and Wisbech in Cambridgeshire, England. A number of proposals are currently being investigated relating to the possible restoration of passenger services along the route.
Gauntlet track or interlaced track, also gantlet track (AE) is an arrangement in which railway tracks run parallel on a single track bed and are interlaced in such a way that only one pair of rails can be used at any time. Since this requires only slightly more width than a single track, all rails can be carried on the same crossties/sleepers. Trains run on the pair of rails appropriate to their direction, track gauge or loading gauge.
A double-track railway usually involves running one track in each direction, compared to a single-track railway where trains in both directions share the same track.
Exeter Central railway station is the most central of the stations in the city of Exeter, Devon, United Kingdom. It is 171 miles 30 chains (275.8 km) down the line from London Waterloo. The station is smaller than Exeter St Davids on the west side of the city. Great Western Railway manages the station and operates most services, with South Western Railway providing the rest. With 2.783 million entries and exits from 2023-2024, it has overtaken Exeter St Davids as the busiest station in Devon.
Rail freight transport is the use of railways and trains to transport cargo as opposed to human passengers.
Templecombe railway station serves the village of Templecombe in Somerset, England. It is situated on the West of England Main Line, 112 miles 2 chains (180.3 km) down the line from London Waterloo. The main station opened in 1860 but a smaller station on the lower line opened in 1862. It was closed in 1966 but was reopened in 1983 following local community pressure. It is currently operated by South Western Railway.
Radyr railway station is a railway station serving the Radyr area of Cardiff, South Wales. It is at the foot of the hill at the eastern edge of the village, alongside the River Taff and adjacent to the Taff Trail. The station is on the Merthyr Line, and is also the northern terminus of the City Line.
Barnetby railway station serves the village of Barnetby-le-Wold in North Lincolnshire, England. It is operated by TransPennine Express, with East Midlands Railway and Northern Trains also serving the station.
Forres railway station serves the town of Forres, Moray in Scotland. The station is managed and served by ScotRail and is on the Aberdeen–Inverness line, between Nairn and Elgin, measured 119 miles 42 chains (192.4 km) from Perth via the Dava route.
The East Coast Main Line Route Utilisation Strategy (RUS), published by Network Rail in February 2008, was the seventh RUS.
The application of railway signals on a rail layout is determined by various factors, principally the location of points of potential conflict, as well as the speed and frequency of trains and the movements they require to make.
A train station, railroad station, or railroad depot and railway station is a railway facility where trains stop to load or unload passengers, freight, or both. It generally consists of at least one platform, one track, and a station building providing such ancillary services as ticket sales, waiting rooms, and baggage/freight service. Stations on a single-track line often have a passing loop to accommodate trains travelling in the opposite direction.
The Reading–Taunton line is a major branch of the Great Western Main Line from which it diverges at Reading railway station. It runs to Cogload Junction where it joins the Bristol to Exeter and Penzance line.
Communications-based train control (CBTC) is a railway signaling system that uses telecommunications between the train and track equipment for traffic management and infrastructure control. CBTC allows a train's position to be known more accurately than with traditional signaling systems. This can make railway traffic management safer and more efficient. Rapid transit system are able to reduce headways while maintaining or even improving safety.
Media related to Rail junctions at Wikimedia Commons