A. Don’t follow too closely B. Keep distance C. Accident area D. Road closed E. Road work ahead F. Two-way traffic G. One-way traffic H. Bend ahead I. Bus lane J. Electronic toll collection(ETC) K. Service area L. No passing M. No parking N. Dead end O. No horn P. Falling rocks Q. Slow down at exit 1.( ) 单相行驶 ( ) 事故多发区 2.( ) 电子收费 ( ) 小心岩石滑落 3.( ) 前方弯道 ( ) 服务区 4.( ) 保持车距 ( ) 公交车专用道 5.( ) 禁止鸣号 ( ) 前方道路封闭