Chapter 1 Review of Automatic Passenger Counting Systems in Public Urban Transport Ivan Grgurevi´ c, Karlo Jurši´ c, and Vinko Rajiˇ c 1.1 Introduction The assessment of the number of passengers in public urban transport (PUT) is of crucial importance for the organization of public transport in urban environments, which is of special assistance in planning and managing the transport services. Currently, there are diverse implementations of technologies and methods for the counting of persons/people, with the aim of collecting data for the optimization of operation. The counting of persons, that is, passengers as a method of optimizing the provision of transport services in PPT is infallible as part of the passenger transport logistics. The passenger transport logistics is focused on creating the transport demand in accordance with the requirements and needs of the PPT users. Therefore, it is important for the information to be accurate and timely since PPT should be the primary transport mode in urban environments because it has numerous advantages such as economy, ecological acceptability, reduction in the number of road vehicles, realizing a reduction in traffic congestion, and so on. Special attention while planning the transport services is added to PPT services and urban planning also has to be taken into consideration. For efficient planning as well as the realization of the service, accurate, precise and reliable as well as timely information must be provided, which includes the service area—wider urban area (which does not always coincide with the city limits), population density [inhabitants/km 2 ]— ratio of the number of inhabitants to the number of km 2 and the population—number of inhabitants in the area of PPT service [1]. I. Grgurevi´ c() · K. Jurši´ c · V. Rajiˇ c Department of Information and Communications Traffic, Faculty of Transport and Traffic Sciences, University of Zagreb, Zagreb, Croatia e-mail: igrgurevic@fpz.unizg.hr © The Author(s), under exclusive license to Springer Nature Switzerland AG 2022 L. Knapˇ ciková et al. (eds.), 5th EAI International Conference on Management of Manufacturing Systems, EAI/Springer Innovations in Communication and Computing, https://doi.org/10.1007/978-3-030-67241-6_1 1