Designation of places for public transport stops is a key component of research on their accessibility. However, further research is needed to solve the problem with organization of public transport stops. This paper provides the results of an priori ranking analysis aimed at defining the most significant factors affecting the accessibility of stops and their scope. The proposed mathematical model, which uses dimensional theory, consists of two stages: pedestrians' movement to a stop and passengers' trip to a transit stop. It is a theoretical premise that allows to determination of placement of public transport stops considering the main indicators, which are the distance covered by pedestrians and the speed of public transport.