Please refer to the following publications for the detailed descriptions to the datasets.

C.Wang, Y.Fang, H.Zhao, C.Guo, S.Mita, H.Zha, Probabilistic Inference for Occluded and Multiview On-road Vehicle Detection, IEEE Trans. on Intelligent Transportation Systems, 17(1), 215-229, 2016.
C.Wang, H.Zhao, C.Guo, S.Mita, H.Zha, On-road Vehicle Detection through Part Model Learning and Probabilistic Inference, IEEE/RSJ Int. Conf. on Intelligent Robots and Systems (IROS), 4965-4972, 2014.
 
For questions, please email: zhaohj@cis.pku.edu.cn.