We describe our ongoing project to establish collaborative safety mechanism based on mutual sharing of driver's information. Most conventional driving safety approaches aims at assisting individual drivers by providing various safety information to the driver on the vehicle. However, the effect of such system highly depends on drivers' response. In our approach, we try to make the driver's present performance to be shared with other drivers and pedestrians. Using this sharing mechanism, people in traffic will be able to make better prediction of other driver's behavior and it leads to their proactive actions to prevent accidents.