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In the tables of knots and links in Dale Rolfsen's 1976 book Knots and Links, extending earlier listings in the 1920s by Alexander and Briggs, the Borromean rings were given the Alexander–Briggs notation "6 3 2", meaning that this is the second of three 6-crossing 3-component links to be listed.
The 11th edition of the MUTCD was released on December 19, 2023. [1] The effective date, 30 days after publication, of the MUTCD was January 18, 2024.
Warning signs in China are triangular with a black border, yellow background and black symbol. Mandatory signs generally follow European conventions (circular with red border/blue circle) with some local variations. Direction signs have these colours: Green for expressways; Brown for tourist attractions; Blue for other roads
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 ...
3.1 Gallery of stop signs. 3.2 Gallery of other signs. 4 British Columbia road signs. ... and a heavier reliance on symbols rather than text legends. ...
Can be extended to 1–2–3 or 1–2–3–4, etc. depending on a combination of racing series and team size. 107% rule Often used in Formula One or other racing series, it is a rule where the driver must qualify the car within 107% of the polesitter's time to be allowed to compete. Variations of this may be used to monitor drivers and warn ...
A FBI document obtained by Wikileaks details the symbols and logos used by pedophiles to identify sexual preferences. According to the document members of pedophilic organizations use of ...
[2] [3] Another example is the United Kingdom's "pass either side" sign, which has a more specific meaning. Unlike many countries, the sign indicates that drivers may pass on either side of an obstacle, such as a traffic island, to reach the same destination. [4]