What are the challenging benchmarks for self driving cars object detection beside Kitti
You may find Apolloscape dataset interesting. It was recently released by Baidu. From the article describing the dataset:


  In this paper, we present a large-scale open dataset,
  ApolloScape, that
  consists of RGB videos and corresponding dense 3D point
  clouds.


Apart from the article,
there have been some blog posts with summarized information on the dataset.