This document discusses the economic merits of public transportation systems, specifically subways. It begins by outlining the various modes of public transportation, including buses, light rail, subways, and more. It then focuses on subways, explaining that they provide fast transportation for large groups of people while avoiding collisions. The document lists several economic benefits of subways, such as generating jobs, increasing property values and business revenues. It also notes that subways are safer and can save households money compared to automobile use. In conclusion, while public transportation provides economic and environmental benefits, it also has some disadvantages such as lack of late night service in some areas.