Express train of Kiev in Vinnitsa railway station. Ukraine.
Express trains (also sometimes referred to as "fast trains", though this is a relative term, usually meaning "faster than some other trains on the line in question") are a form of rail service. Express trains make only a small number of stops, instead of stopping at every single station. In some cases, trains run express where there is overlapping local train service available, and run local at the tail ends of the line, where there is no supplemental local service. During overnight hours, or other times where it is practical, express trains may become local, but still running to where an express train would terminate.