form of transport; mode of transport
Refers to the specific method or system used for transporting goods or people, such as truck, rail, air, or ship.
Trucks are the main form of transport in this region.
Drone delivery is attracting attention as a new mode of transport.
交通手段 is a broader term for 'means of transportation' often used in daily life, while 輸送形態 is more technical and focuses on the form or mode of freight/passenger transport systems.
Compound of 輸送 (transport) and 形態 (form, mode).