Why platform vendors crouch when trains pass: The science of rail safety

When a train travels at high speed, it creates significant changes in air pressure and velocity in its immediate vicinity. The rush of air displaced by the moving train can create a sensation of being drawn toward the passing vehicle—a phenomenon that has prompted many platform vendors and railway workers to adopt protective measures.

The science underlying this effect relates to Bernoulli's principle, which describes how pressure decreases as fluid velocity increases. As a train moves rapidly along tracks, it compresses air in front of it while creating a zone of lower pressure in its wake. This pressure differential can generate forces capable of pulling nearby objects and people toward the train.

Railway safety experts emphasize that crouching or moving away from the platform edge when trains pass is a sensible precaution. The aerodynamic effects intensify when two trains pass each other in opposite directions, doubling the pressure variations and creating stronger suction forces. Platform vendors, who typically work in close proximity to moving trains, have learned through experience to minimize their exposure during these high-risk moments.

Indian Railways continues to reinforce safety protocols, urging passengers and workers to maintain adequate distance from platform edges and moving trains. Maintaining at least two meters from the platform edge when trains are in motion significantly reduces the risk of accidents caused by aerodynamic forces or loss of balance.