Cooperative Intelligent Transport Systems (C-ITS) is a surface transportation environment where connected devices, such as vehicles or mobile devices (e.g., smartphones) interact or "talk" directly with each other, and the road infrastructure. This environment could dramatically reduce the number of fatalities and injuries on the roadways, while improving mobility and environmental impacts. The roadside units (RSU) is a key enabling component of the C-ITS environment - it serves as an interface, also known as vehicle-to-infrastructure (V2I) interface, between connected devices and the roadway infrastructure. This standard specifies the logical interface between an RSU and the controlling management stations. This standard defines information that may be exchanged across this interface. This standard identifies the relevant RSU users and their needs, defines requirements that enable information exchanges that supports those needs, and finally defines the data objects including the relative structure of that data, necessary to meet these requirements.