A — Don ’ t follow too closely. J— Electronic toll collection (ETC) B— Keep distance K— Service area C— Accident area L— No passing D— Road closed M— No parking E— Road work ahead N— Dead end F— Two-way traffic O— No horn I-- Bus lane G— One-way traffic P— Falling rocks H— Bend ahead Q— Slow down at exit ()单向行驶 ()事故多发区 ()电子收费 ()小心岩石滑落 ()前方弯道 ()服务区 ()保持车距()公交车专用车道 ()禁止鸣号 ()前方道路封闭