The paper describes the stages of a smart city's concept from the point of view of transport. Simultaneously, the concept of smart cities is intimately interconnected with the use of unmanned vehicles. The hardware components resolve the unmanned vehicle to see, communicate, and move. The unmanned vehicle software provides the perception of sensor data, planning, and motion control based on the processed data. But the use of the unmanned vehicle is associated with risks and security issues associated with vulnerabilities in both software and hardware. In this regard, the necessity of developing safety management systems for unmanned vehicles is shown, based on identifying risk factors and assessing their degree of danger, as well as examples of sources of the main vulnerabilities of intelligent unmanned vehicles. The necessity of using safety functions is shown to determine how the control system of an unmanned vehicle meets the requirements for this system at all stages of the life cycle.