A DRS train is when cars become locked in a row behind a lead driver. This is because the group of drivers within the one-second DRS range of the driver ahead of them are unable to make any progression on the cars ahead of them due to the car in front also having DRS, resulting in a train of cars. 2024 April 3, Joe Holding, Rebecca Braybrook, “What do DRS, black and white flag, porpoising and more mean? F1 terms explained”, in Autosport:
He used DRS at the perfect time to gain a position by overtaking his opponent.