berth charge; sleeping-car fare
Refers to the additional fee for a sleeping berth on a train or ferry, beyond the basic fare.
The berth charge is required separately.
寝台券 is a berth ticket, while 寝台料金 is the charge itself.
運賃 is the basic fare for transportation, whereas 寝台料金 is an additional charge for a sleeping berth.
Compound of 寝台 (shindai, 'bed' or 'berth') and 料金 (ryōkin, 'fee' or 'charge').