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The polar bear warning sign in Svalbard recently changed from displaying a black bear on white background to a white bear on black background (both signs are triangular with a red border). Some countries (like France, Norway and Spain) that normally use a white background have adopted an orange or amber background for road work or construction ...
Local traffic road signs usually employ black text on white. Exceptions are the Czech Republic (yellow-on-black), Finland (white-on-black), Austria and Spain (white-on-green), as well as Denmark, Iceland and Poland (blue-on-white). Tourist sighting signs usually employ white on some shade of brown. Detours use black on a shade of yellow or orange.
Mandatory signs are road signs that are used to set the obligations of all traffic that uses a specific area of road. Most mandatory road signs are circular in shape and may use white symbols on a blue background with a white border, or black symbols on a white background with a red border, although the latter is also associated with prohibitory signs.
The No Entry / Do Not Enter sign may or may not feature text. In Ireland, an upwards-pointing arrow contained within a slashed red circle is used instead. Some countries have those two signs separated. The Latin American-style do not proceed straight sign may take a different meaning in countries with standard No Entry signs.
In many European countries the dark background with light coloured text version of the sign is intended for information only. [16] Poland uses white text on a green background (E-17a/E18a) to show the political boundary of a place as information and uses the black on white pictogram version (D-42/D-43) to designate the change of traffic rules. [17]
Overtaking is prohibited either for all vehicles or for certain kinds of vehicles only (e.g. lorries, motorcycles). In the USA, this is usually phrased as "no passing zone" and indicated by a rectangular, black-on-white sign on the right side of the road that says "DO NOT PASS", and/or by a solid yellow line painted on the roadway marking the left limit of traffic (centerline), and sometimes ...
These colors are also reflected in the Pan-African flag (black, red, and green) and the Ethiopian flag (green, gold, and red), which both have uplifting backgrounds that highlight the resilience ...
Mandatory instructions are white on a blue background, prohibitions are black on a white background with a red border, and supplementary information signs are rectangular with black text on a white background. Like other countries, the signs use pictograms to display their meaning.