noun
shuttle service; shuttling back and forth
Refers to a transportation service that runs back and forth repeatedly between two points, such as a shuttle bus or train.
駅と会場の間で折り返し運転のバスが出ています。
A shuttle bus is running back and forth between the station and the venue.
A loanword for 'shuttle bus', often used in casual contexts, while 折り返し運転 is a more formal or technical term.
Compound of 折り返し (おりかえし, 'turning back') and 運転 (うんてん, 'operation' or 'driving').