Traffic Signs Regulations and General Directions

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[2024-06-20]. （原始内容存档于2022-09-20）.  Jones, Andrew. The Traffic Signs Regulations and General Directions 2016. legislation.gov.uk（英语：legislation.gov.uk）. Department

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A Collection of Stop and Yield Signs. mycrazyhobby.com. （原始内容存档于2017-12-28） （英语）.  History of the Yield sign. Road Traffic Signs. （原始内容存档于2021-07-24）