Driving scene understanding is an important part of intelligent transportation systems. In order to build a transportation system that can operate in physical and social environments, researchers need to understand and study how humans drive and interact with traffic scenes. To solve this problem, the HDD dataset came into being. The full name of this dataset is Honda Research Institute Driving Dataset, which consists of 104 hours of real driving scenes (collected in the San Francisco Bay Area) and is used to study the behavior of drivers in real scenes.