A platooning method in which a leader vehicle of a group of vehicles provides a control signal and one or more follower vehicles travel according to the control signal, the method comprising: determining (S100) a communication state of the group; adjusting (S200) a distance between at least two of vehicles included in the group by the leader vehicle, based on the communication state, wherein a plurality of vehicles included in the group are arranged in a line to perform platooning, characterised in the method further comprising: receiving (S710), by the leader vehicle, signal information of a traffic light installed in a section through which the group should pass, the signal information including time to pass; determining (S720), by the leader vehicle, whether all the vehicles in the group are able to pass through the traffic light at one time, based on the signal information and a length and position of the group; performing platooning (S760) in a line by a plurality of vehicles included in the group, when it is determined that all the vehicles in the group are able to pass through the traffic light at one time; and dividing (S740) the group into a plurality of subgroups, and individually performing platooning by the plurality of subgroups, when it is determined that all the vehicles in the group are not able to pass through the traffic light at one time. determining (S100) a communication state of the group; adjusting (S200) a distance between at least two of vehicles included in the group by the leader vehicle, based on the communication state, wherein a plurality of vehicles included in the group are arranged in a line to perform platooning, characterised in the method further comprising: receiving (S710), by the leader vehicle, signal information of a traffic light installed in a section through which the group should pass, the signal information including time to pass; determining (S720), by the leader vehicle, whether all the vehicles in the group are able to pass through the traffic light at one time, based on the signal information and a length and position of the group; performing platooning (S760) in a line by a plurality of vehicles included in the group, when it is determined that all the vehicles in the group are able to pass through the traffic light at one time; and dividing (S740) the group into a plurality of subgroups, and individually performing platooning by the plurality of subgroups, when it is determined that all the vehicles in the group are not able to pass through the traffic light at one time. receiving (S710), by the leader vehicle, signal information of a traffic light installed in a section through which the group should pass, the signal information including time to pass; determining (S720), by the leader vehicle, whether all the vehicles in the group are able to pass through the traffic light at one time, based on the signal information and a length and position of the group; performing platooning (S760) in a line by a plurality of vehicles included in the group, when it is determined that all the vehicles in the group are able to pass through the traffic light at one time; and dividing (S740) the group into a plurality of subgroups, and individually performing platooning by the plurality of subgroups, when it is determined that all the vehicles in the group are not able to pass through the traffic light at one time. <EOS>