mass transit summary

Streetcar, vehicle that runs on track laid in the streets, operated usually in single units and usually driven by electric motor. Early streetcars were either horse-drawn or depended for power on storage batteries that were expensive and inefficient. In 1834 Thomas Davenport, a blacksmith from

Subway, underground railway system used to transport large numbers of passengers within urban and suburban areas. Subways are usually built under city streets for ease of construction, but they may take shortcuts and sometimes must pass under rivers. Outlying sections of a system usually emerge

Bus, any of a class of large, self-propelled, wheeled vehicles that are designed to carry passengers, generally on a fixed route. They were developed at the beginning of the 20th century to compete with streetcars by providing greater route flexibility. The bus was a natural outgrowth of the