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 G — One-way traffic P — Falling rocks H — Bend ahead Q — Slow down at exit I — Bus lane Examples: (Q) 出口慢行( M )禁止泊车 ( ) 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