Counting of passengers in public transport system is a very significant task which must be performed for sustainable city planning. In different countries and cities this task performed very differently, or not performed at all, as well as there are no clearly defined international standards for public transport passenger flow analysis, and as a result, for system sustainable development. There are a lot of approaches and methods for passenger flow tracking, but all this approaches have their own disadvantages. It is clear, that often population of cities grow faster than public transport system and its infrastructure. But in reality - it will be very good to look for the online balance between the capacity of the public transport network and actual flow of passengers. In this research solving of passenger counting problem will be performed using such an estimative scientific method of remote sensing as photogrammetry. The case study of passenger counting in public transport system for Riga city is also described in current article for better understanding of the offered approach.