transport volume; traffic volume; quantity of goods transported
Refers to the amount of freight, cargo, or passengers moved over a period, often used in logistics, economics, and transportation planning.
This year's freight transport volume increased compared to the previous year.
Railway passenger traffic volume is decreasing.
貨物量 means 'cargo volume' and is narrower, referring only to freight, whereas 輸送量 can include both freight and passengers.
Compound of 輸送 (transport) and 量 (quantity, volume).