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A stop sign is a traffic sign to notify drivers that they must stop before proceeding.〔Vienna Convention on Road Signs and Signals, 1968. United Nations Publication. ISBN 978-92-1-116973-7〕 ==Vienna Convention== The 1968 Vienna Convention on Road Signs and Signals allows for two types of stop sign, as well as three acceptable variants. Sign B2a is a red octagon with the inscription "STOP" in white. Sign B2b is a red circle with a red inverted triangle with either a white or yellow background, and the inscription "STOP" in either black or dark blue. The Convention allows for the word "STOP" to be in either English or the national language of the particular country. File:Vienna_Convention_road_sign_B2a.svg|B2a File:Vienna Convention road sign B2b (v1).svg|B2b File:Vienna Convention road sign B2b (v2).svg|Acceptable variant of B2b File:Vienna Convention road sign B2b (v3).svg|Acceptable variant of B2b File:Vienna Convention road sign B2b (v4).svg|Acceptable variant of B2b 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「stop sign」の詳細全文を読む スポンサード リンク
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