America’s first subway, the T is easy to use, efficient and inexpensive, though delays often cause grumbles. Transfers between subway lines are free, but transfers from subways to buses are only free with a CharlieCard. Trains run from 5.15am to 12.30am Mon–Sat and from 6am to 12.30am on Sundays. Free T maps are available from the larger stations.
Although the Silver Line routes appear on subway maps, they actually use buses. Silver Line Waterfront serves the airport, South Station and the South Boston Waterfront. Silver Line Washington Street serves Downtown Crossing, Washington Street and Dudley Square in Roxbury, and charges a local bus fare.
Not many people know that each branch color was chosen to reflect a characteristic of the area the line covers. The Green Line, for example, was named in honor of the Emerald Necklace, the chain of parks that links Boston and the western suburbs.