Methods for vehicle management and systems for traffic management

A vehicle management method includes allowing a start of a corresponding vehicle when one of a plurality of unique identified removable cards (UIRC) is connected to one of a plurality of vehicles, and matches the corresponding vehicle, and connecting a plurality of started vehicles, via each of the unique identified removable cards, to enable communication among the plurality of started vehicles such that each of the plurality of started vehicles outside a coverage of a vehicle management center is capable of directly obtaining traffic information from nearby vehicles of the plurality of started vehicles.