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The standard was published in October 2003, splitting off from ISO 3864:1984, which set out design standards and colors of safety signage and merging ISO 6309:1987, Fire protection - Safety signs to create a unique and distinct standard for safety symbols.
The term also applies when a light rail line with separate right-of-way or reserved track crosses a road in the same fashion. Other names include railway level crossing , [ 1 ] railway crossing (chiefly international), grade crossing or railroad crossing (chiefly American), [ 2 ] road through railroad , criss-cross , train crossing , and RXR ...
In the United States, "light railway" generally refers to an urban or interurban rail system, which historically would correspond to a streetcar network. The distinct term light rail was introduced in the 1970s to describe a form of urban rail public transportation that has a lower capacity and lower speed than a heavy rail or metro system, but which generally operates in exclusive rights-of ...
The Vienna Convention on Road Signs and Signals, a multilateral treaty of the United Nations with the intention of standardizing traffic signs around the world, prescribes several different regulations for the "crossbuck" sign. The sign should consist of two arms not less than 1.2 metres (3.9 ft) long, crossed in the form of an . The first ...
In some countries (such as the Czech Republic or Slovakia) there is also a flashing white light, which means that it is possible to pass the level crossing at a higher speed than generally allowed. At many crossings, there will be a barrier (or "gate" in the US) added to the signal, which descends over the road and blocks entry. The barriers ...
Signals and barriers are installed at all crossings while manual crossings are additionally required to have the hand red and green signal lamps. Level crossing barriers have yellow and black arms with a bilingual stop sign placed in the middle. Indian Railways aims at elimination of all unmanned crossings and replacing them with manned crossings.
The term also applies to divided roadways other than highways, including some major streets in urban or suburban areas. The reserved area may simply be paved, but commonly it is adapted to other functions; for example, it may accommodate decorative landscaping, trees, a median barrier, or railway, rapid transit, light rail, or streetcar lines.
Efforts to remove level crossings are done in the UK by Network Rail and in Melbourne as part of the Level Crossing Removal Project. The London Extension of the Great Central Railway, built between 1896 and 1899, was the first fully grade-separated railway of this type in the UK. This also applies to light rail and even to street cars.
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