NordicWay has implemented a cooperative safety-related traffic information system based on hybrid communication using a mainly cellular network. In this paper, we present NordicWay’s Finnish Coop project evaluation results on driver behaviour impacts and user acceptance of the system. The evaluation was based on a field test involving more than a thousand test users from May 2016 to April 2017. The results showed the high acceptance by the users. The system was the first source of information in many occasions and the implications it had on driver behaviour were positive (increased attention, speed reduction, less overtaking, etc.). As a main conclusion, the results indicate that a cooperative safety-related traffic information system in mobile phones has positive impacts on driver behaviour. The results also show that road users would be willing to use this kind of system. Almost all users who had longer experience with the system would have been willing to continue using the application.