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The time interval may be controlled by a level crossing predictor, an electronic device which is connected to the rails of a railroad track, and activates the crossing's warning devices (lights, bells, gates, etc.) at a consistent interval prior to the arrival of a train at a level crossing. [1]
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.
After the Ufton Nervet rail crash, there have been increased efforts to review the placing of level crossings and to eliminate them where this is practicable.In the UK it has also been suggested that cameras similar to the type used to detect drivers who run traffic lights be deployed at level crossings, and that penalties for ignoring signals should be much more severe.
In Norway, level crossings have crossbucks colored in a white background with a red border, with similar lights to the German crossings, although the white light flash when the crossing is clear, instead of a yellow warning light, and the red light flashes, as do the lights on the barriers.
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 allowed by last signal. Their posts are painted black and white strips.
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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 ...
A position light signal is one where the position of the lights, rather than their colour, determines the meaning. The aspect consists solely of a pattern of illuminated lights, which are all of the same colour. In many countries, small position light signals are used as shunting signals, while the main signals are of colour light form.