A method of a first transportation vehicle for predicting channel load. The first transportation vehicle predicts a critical area with channel congestion of at least one communication channel, determines a propagation trajectory of at least one second transportation vehicle and compares the propagation trajectory of the at least one second transportation vehicle and the critical area. Based on the comparison, the first transportation vehicle then selectively transmits a message having information on the critical area to at least one second transportation vehicle. Also disclosed is a transportation vehicle for performing the method and a computer program having instructions for performing the method.