At the most basic level, humans move and thus interact with each other by walking, but transportation geography typically studies more complex regional or global systems of transportation that include multiple interconnected modes like public transit, personal cars, bicycles, freight railroads, the Internet, airplanes and more.
在最基本的层面上，人类活动，从而互相走动，但交通运输地理学通常研究更加复杂、区域性或全球性的系统，包括多重相互连接的方式，比如公共交通、私家车、自行车、货运铁路、互联网、飞机等。