Accidents 1 Autonomous Vehicles 1 Autonomous vehicles 1 Construction sign detection 1 Construction signs Cut-and-paste 1 Deep learning 1 Image processing 1 Images synthesis 1 Large amounts 1 Perspective transformation 1 Real-world 1 Sign detection 1 Traffic signs 1 Training image 1 construction sign detection 1 cut-and-paste 1 image synthesis 1 perspective transformation 1