Cooperative C-ITS systems are based on communication (two-way data exchange) regarding the current road traffic situation, both between vehicles themselves (V2V) and between vehicles and equipment on the road infrastructure (V2I). Cooperative C-ITS systems do not directly interfere with the vehicle control systems, the appropriate response is at the discretion of the (pre-warned) driver. By receiving a warning message, the driver can be informed in time to react to an unexpected traffic situation as quickly as possible and to the best of his/her ability. This is even in low visibility, when, for example, it would otherwise react correctly and in time in better conditions.
For more information on this topic, please visit the C-ROADS project page here
. Information on the various C-ITS systems can be found here