Boston boasts the first subway system in the United States. Familiarly known as the T, it made its first short run (under one mile) in September 1897. Significantly, it has continued operation since, and is one of the few legacy subway systems in the country. Its predecessors in Boston—other modes of transportation like the omnibus, horsecar, electric streetcar, and elevated rail—moved people en masse but relied on available surface area and the city’s existing maze of streets.