Why are some public transportation modes very popular, such as the subway? This question explores public transportation modes, especially why mass transit tools like the subway are widely welcomed. When answering, one can analyze from various perspectives such as convenience, affordability, environmental friendliness, and give examples of how these modes of transportation meet the travel needs of modern urban residents.

Why are some public transportation modes very popular, such as the subway? This question explores public transportation modes, especially why mass transit tools like the subway are widely welcomed. When answering, one can analyze from various perspectives such as convenience, affordability, environmental friendliness, and give examples of how these modes of transportation meet the travel needs of modern urban residents.