The integration of railway transport in Riga city public transport control is important for passenger’s service, using existing recourses. However the integration of transport control systems just started developed in 3 years. The first implemented system was bus control system – ASOS. The using of transport control procedure for co – modal transportation of passengers in Riga city. The dynamic control for transport modes in pre - defined time interval and composite the final control procedure for each transport mode and harmonize the motion with aim to arrive transport in time and harmonize railway and public transport motion. An effective tool of research of problems of optimum control is the principle of a maximum by Pontryagin's Maximum Principle representing a necessary condition of optimality in such problems. The procedure deals with, consists of two main parts: operating procedure in this case, routing of passenger’s flow and object of control in this case passenger’s transport. The objects of control are divided in three levels: transport means, a vehicle, or all system of public transport of city etc. can be considered. The operating kernel since occurrence of problems of control has undergone evolutions from the elementary regulator to modern informational systems – intelligent transports system.