**2.2 Roadside component**

The roadside component includes variable message signs, traffic lights and other units which are equipped with communication capabilities. This way, the roadside component can communicate with other vehicles by sending them information or acting as a relay station supporting multi-hop communication. Moreover, this component can communicate with other roadside units and the central system and therefore forward information received from vehicles. The roadside component can be also connected to the Internet.

#### **2.3 Personal component**

The personal component is actually a nomadic device, that is a personal navigator or a smartphone, which can host a variety of ITS applications. These devices can also support cooperative ITS applications based on communication with other road users or the road infrastructure.
