こうつうきかん交通機関koutsuukikan
1.

A comprehensive term referring to the various means and infrastructure enabling the movement of people and goods, including vehicles such as trains, cars, ships, and airplanes, as well as the roads, bridges, and other facilities that support them.

2.

A collective designation for systems and structures that facilitate both human travel and freight transport, potentially encompassing communication methods like telegraphs and telephones.

3.

An overarching category that includes all types of transportation modalities and their associated facilities, allowing for the efficient transfer of individuals and commodities from one location to another.

Example:

交通機関は何を使うんですか。

こうきょうこうつうきかん公共交通機関koukyoukoutsuukikan
1.

People-moving systems that operate on shared routes and schedules, designed to facilitate the travel of individuals within urban, suburban, or rural areas.

2.

Services that provide transportation to the public, typically including buses, trains, subways, and trams, aimed at reducing traffic congestion and environmental impact.

3.

Infrastructure and modalities that enable collective mobility for the general population, ensuring accessibility and convenience for commuting and travel.