PassengerFlows: A Correlation-Based Passenger Estimator in Automated Public Transport. - Fang-Jing Wu; Yunfeng Huang; Lucas Döring; Stephanie Althoff; Kai Bitterschulte; Keng Yip Chai; Lidong Mao; Damian Grabarczyk; Ernö Kovacs (IEEE Trans. Netw. Sci. Eng., 2020)