J. Ivanchev, S. Litescu, D. Zehe, M. Lees, H. Aydt, and A. Knoll, “Hard and Soft Closing of Roads Towards Socially Optimal Routing,” in Proceedings of the 21st International Conference on Intelligent Transportation Systems (ITSC 2018), Maui, HI, USA, Nov. 2018, pp. 3499–3504, DOI: 10.1109/ITSC.2018.8569694.