Dali Wei

Postdoctoral Researcher

1357 S. 46th Street
Building 177, Room 3, Richmond Field Station
Richmond, CA 94804-3580
United States
Email Address: 

Current Research

Using Cooperative ACC (CACC) to Form High-Performance Vehicle Streams

Cooperative Adaptive Cruise Control (CACC) represents the combination of adaptive cruise control (ACC) with wireless communication among vehicles and between vehicles and the infrastructure. The vehicle-vehicle (V2V) cooperative form of CACC enables the vehicles to follow each other more accurately and closely than conventional ACC. This significantly improves traffic flow stability and capacity. My current research studies the impacts that ACC and CACC are likely to have on traffic. We will develop microsimulation models to analyze the dynamics of the ACC and CACC systems calibrated using the field test data, and to explore vehicle platoon formation and dissolution strategies to produce the most favorable traffic impacts.


Dr. Wei earned his Ph.D. degree and Master's degree in Transportation Engineering from Texas Tech University in 2014 and 2012, respectively. In 2010 he earned his first master's degree in Control Engineering (focusing on Pattern Recognition and Artificial Intelligence) from University of Science and Technology of China. Dr. Wei has a broad research background and interests, but his primary interests are in the areas of Intelligent Transportation Systems, Traffic Simulation, and Traffic Signal Control and Optimization. Prior to joining PATH, Dr. Wei worked as a post-doctoral researcher at University of California Davis, and as a research faculty at University of Nevada Reno. He has been actively involved in multiple research projects funded by the state and federal department of transportation. He received the Horn Professor Graduate Achievement Award from Texas Tech University in 2014.

Recent Journal Publications:

Wesley Kumfer, Dali Wei and Hongchao Liu, Investigating the effects of demographic and driver factors on single-vehicle and multi-vehicle fatal crashes using multinomial logistic regression. Transportation Research Record, In press, 2015

Dali Wei, Hao Xu, Hongchao Liu, Wesley Kumfer, Ziyang Wang, Vehicular traffic capacity at unsignalized crosswalks with probabilistic yielding behavior, Transportation Research Record, In press, 2015.

Dali Wei, Hongchao Liu, Zong Tian, Vehicle delay at unsignalized crosswalks with probabilistic yielding behaviour. Transportmetrica A: Transport Science, Vol. 11, Iss. 2, 2015. 

Dali Wei, Hongchao Liu. Asymmetric driving behavior analysis using a self-learning approach. Transportation Research Part B: Methodological, vol. 47, pp. 1-14, 2013.

Dali Wei, Hongchao Liu. An adaptive margin support vector regression for short-term traffic flow forecasting. Journal of Intelligent Transportation Systems: Technology, Planning, and Operations, 17(4), pp. 1-11, 2013.