Keywords: Taiwan road sign Art050.3-1977.png zh-tw 中華民 禁止標誌禁37:電氣化單線鐵路平交道 en Taiwanese Prohibitory Sign P37 Electric Railroad Crossing File ROC1977-09-14道路交 標誌標線號誌設置規則修正 文 pdf 第五十 Article 50 gov tw 1977-09-14 PD-ROC-Traffic Signs Diagrams of warning crosses in Taiwan Road signs in Chinese language Diagrams of historic road signs of Taiwan Electricity warning road signs |