Search results
Results From The WOW.Com Content Network
Railway signalling (BE), or railroad signaling (AE), is a system used to control the movement of railway traffic. Trains move on fixed rails , making them uniquely susceptible to collision . This susceptibility is exacerbated by the enormous weight and inertia of a train, which makes it difficult to quickly stop when encountering an obstacle.
CBTC is a signalling standard defined by the IEEE 1474 standard. [1] The original version was introduced in 1999 and updated in 2004. [1] The aim was to create consistency and standardisation between digital railway signalling systems that allow for an increase in train capacity through what the standard defines as high-resolution train location determination. [1]
There are two main types of signaling aspect systems found in North America, speed signaling and weak route signaling. [citation needed] Speed signaling transmits information regarding how fast the train is permitted to be going in the upcoming segment of track; weak route signaling transmits information related to the route a train will be taking through a junction, and it is incumbent upon ...
[10] The Uff/Cullen inquiry in 2001, following the Southall and Ladbroke Grove rail crashes, identified a need for in-cab signalling on high-speed trains, and recommended that ERTMS should be installed onto all of Britain's high-speed lines by the year 2010. However, this timescale was not viable because of the time required to develop the ...
Name of system Line Date System Notes Denmark: Copenhagen Metro: Line M1: 19 October 2002: AnsaldoBreda Driverless Metro / Ansaldo STS DTG [11] Line M2: Line M3: 29 September 2019: AnsaldoBreda Driverless Metro / Ansaldo STS CBTC Line M4: 28 March 2020: France: CDGVAL: Line 1: 3 April 2007: VAL system: Line 2: 27 June 2007: Lille Metro: Line A ...
Signal boxes also served as important communications hubs, connecting the disparate parts of a rail line and linking them together to allow the safe passage of trains. The first signaling systems were made possible by technology like the telegraph and block instrument that allowed adjacent signal boxes to communicate the status of a section of ...
Railway signal in Ploiești West railway station, Romania. This type of signal is based on the German Ks signals. The signal head is the portion of a colour light signal which displays the aspects. To display a larger number of indications, a single signal might have multiple signal heads. Some systems used a single head coupled with auxiliary ...
These moving block systems have become popular since the required technology first started appearing in the 1970s. In such systems, any train on the route can listen for signals from all the other trains, and then move in a way to ensure they have enough distance to stop. Early moving block systems used a cable strung along the rail line.