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What is Caution Indicator in Railway terms?? 1 Answers What is Caution Indicator in Railway terms?? Caution Indicator ~~~~~~~~~~~ Arrow-shaped boards pointing to the left or right. These indicate special restrictions on the track (temporary or permanent engineering restrictions) and caution orders in effect; the direction of the arrow indicates which track the restriction applies to. These boards are usually reflective yellow with black markings. The post on which it is mounted has alternating black and white bands. At night, sometimes two yellow lamps illuminate this indicator, although such lighting is not common and perhaps used more for caution indicators that are installed permanently. More often, the reflective... more... |