Matura rozszerzona – leksyka, ćwiczenie 6

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In the world of signals, it’s an undisputed fact that red means stop. From red traffic lights to the stop sign itself, the colour red 1. _____ the drivers’ attention and sends them a message to hit the brakes. But you probably don’t know that the stop sign has only been red for about seventy years. The first one erected in Detroit in 1915 was white, with the word STOP in black letters. 2. _____ 1954 that the sign became red with white letters.

In the early 20th century, stop signs weren’t any specific colour or shape, which confused drivers. In 1922, the American Association of State Highway Officials (AASHO) decided on standardisation and introduced the sign’s octagonal shape. This unique eight-sided shape was chosen 3. _____ drivers who saw the back of the sign were aware that oncoming drivers had a stop sign. The shape could also be identified easily at night, since the original signs were not reflective.

At the same time, the AASHO also considered making stop signs red, but, back then, there was no red dye that wouldn’t 4. _____ over time. They were yellow for the following thirty years. In 1954, sign makers began using special porcelain enamel and achieving a long-lasting red colour was no longer a problem.
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