means of transportation; means of transport
Refers to the method or system used to move people or goods, such as vehicles, ships, or aircraft.
In this area, buses are the main means of transportation.
In an emergency, helicopters become the only means of transport.
交通手段 is broader, referring to any means of getting around (including walking), while 輸送手段 specifically implies the transport of goods or people, often with a logistical or commercial nuance.
Compound of 輸送 (transport) + 手段 (means, method).