Traffic sign detection using the German traffic sign dataset is a multi-class classification problem that contains more than 40 classes and more than 50,000 images. The physical traffic sign instances are unique within the dataset, and each real-world traffic sign only occurs once.
You can follow this link to find out more about the German traffic sign detection dataset: J. Stallkamp, M. Schlipsing, J. Salmen, and C. Igel. The German Traffic Sign Recognition Benchmark: A multi-class classification competition. In Proceedings of the IEEE International Joint Conference on Neural Networks, pages 1453–1460. 2011 (http://benchmark.ini.rub.de/).
