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Level crossing signals are electronic warning devices for road vehicles at railroad level crossings. Level crossings can be operated in various ways. In some countries such as the UK, the warning devices are more often than not activated by remote control, I.e. an operator pressing buttons. However, the majority of countries have automated systems.
On the approach to a movable item of infrastructure, such as points or switches or a swingbridge; In advance of other signals; On the approach to a level crossing; At a switch or turnout; Ahead of platforms or other places that trains are likely to be stopped; At train order stations 'Running lines' are usually continuously signalled.
A level crossing is an intersection where a railway line crosses a road, path, or (in rare situations) airport runway, at the same level, [1] as opposed to the railway line or the road etc. crossing over or under using an overpass or tunnel.
To warn people at a level crossing that a train is coming. An indicator, located 0.4 kilometres (1 ⁄ 4 mile) from the crossing, marks the location where the horn must be sounded when the train is travelling faster than 70 km/h (43 mph). When the train is travelling at 70 km/h or less, this signal must be sounded for twenty seconds prior to ...
Normally, level crossing warning signals display no aspect (i.e. are unlit). They light up in the front of an approaching train which is the first clue that the system is working correctly. Level crossing warning signals are unrelated to other signals, therefore in case of Osp1 signal a train must proceed at 20 km/h regardless the higher speed ...
The bells used on the level crossings may vary differently, most level crossings uses the horn sound (or called in English as minibuzzers), which is varied in different pitches and speed, but some crossings also uses the variable alarm sounders and also some of them uses the siren sound similar to the fire alarm sweep tone or emergency vehicles ...
The exposure index at these three crossings was already high more than a decade ago when the N.C. Department of Transportation and the City of Durham studied 18 crossings along the N.C. Railroad ...
Network Rail is pursuing a policy of closing level crossings at the rate of over 100 a year in the interests of safety, and replacing them with road bridges or footbridges. [22] The number of level crossings on rail lines controlled by Network Rail went from 7,937 in 2003–04 [23] to 6,322 in 2013–14, [24] and 5,887 by 2016–17. [25]