In China there are lots freeways with rapid traffic volume growth, the congestion and accidents always happened on these freeways. In order to solve these problems, the original freeways need reconstruction and extension. During the reconstruction and extension process, the freeway must ensure the normal access. The freeway reconstruction and extension will bring great pressure to the safety situation of the access part. The traffic accidents will increase and the emergency management is very important. The study focuses on the difference of the traffic accidents characters before and after the reconstruction and extension. In order to decrease the impact of the accidents, the emergency management is studied. The key of the emergency management is layout optimization of traffic emergency stations. The layout optimization of traffic emergency stations is also given according to the theory of system optimization, considering the special freeway reconstruction and extension features. The real He’an freeway with reconstruction and extension in Anhui Province in China are applied to test the study.

CICTP