Why Railway Sign Boards Are Painted In Yellow And Black?
Producer: Mehak Pal
Have you ever wondered why the station sign boards are always painted yellow, with the name of the station written in black? Here's everything you need to know about it.
There is a scientific reason behind this colouring of the sign board.
Yellow is placed third among the seven primary colours, in terms of wavelength in the visibility spectrum. The more the wavelength of colour, the farthest it can be seen from.
Yellow can be noticed from afar, even if it is not directly in the path of your eyesight. Yellow is visible even in darkness or in a foggy climate because it spreads more than red in the environment.
The black colour on the yellow sign board is practised with the sole intention of contrasting the colour against yellow, making the writing visible and more distinct.
While steering the train, the loco pilot notices the board and the words written on it from a distance and adjusts the speed accordingly.