Simultaneously, the driver must, if possible, send two persons along the railway track in both directions from the crossing at a distance of 1 kilometer (if one person — then in the direction of the worse visibility of the railway track), explaining them the procedure for making the stop signal to the locomotive driver of an approaching railway vehicle, and himself — stay near the vehicle and give signals of general alarm (combination of one long and three short sound signals).
When of a railway vehicle appears, the driver (passenger) is obliged to run towards it, giving a signal to stop, observing safety precautions. Stop signal is a circular movement by arm (by day the afternoon — with a scrap of brightly coloured fabric or an object easily visible, at night — with a lantern or torch).