Journal of Traffic and Transportation Engineering was started in 2001 by the suggestion of Evaluating Branch of Learning on Traffic and Transportation Engineering of State Council Academic Degree Committee of China. Its responsible department is the Ministry of Education of PRC. Its sponsor is Chang’an University, which is famous with the education and study about road traffic and transportation engineering in China. Its associate sponsors are Evaluating Branch of Learning on Traffic and Transportation Engineering of State Council Academic Degree Committee of China, Southeast University and Southwest Jiaotong University, the latters are excellent in the field of traffic and transportation engineering in China. This journal with ISSN 1671-1637 is published bimonthly in China.