In this report, the Doppler Effect is applied to vehicle-to-vehicle (V2V) communication to identify the vehicle that may have the most dangerous impact on us by utilizing the results of Doppler effect to fast get other vehicles behavior and their sent messages without implementing any visual observations. In the past a vehicle navigates the location of its destination via GPS and at the time when we receive the information, sent from a moving object, to estimate the object’s location that would be different from the object actual location consequently we could not use GPS to precisely locate a moving object position but only to use it as an assistant apparatus to provide a secondary location information. Also the use of GPS could not provide and guarantee the safety of a vehicle. The emergence of fifth generation of mobile communications (5G) prompts people to eagerly exploit the new system to overcome many problems existing in the current communication systems such as the design of a wisdom control system and the data signal transmission time delay so as to enhance the positioning precision in current available positioning technology. If a vehicle is equipped with Doppler radar then it can assess in advance the possible collision situations incurred from other vehicles, and let the driver consider the situation to make proper decision. The reason to use the Doppler radar is that it enables, the information such as distance, relative speed and vehicle’s status etc. can be instantly transferred among vehicles. The main task of this report is to identify the vehicle at the crossroad that is still maintaining its speed without making de-acceleration that could possibly collide with us.