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Beginner's Guide to the Subway

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The subway is the largest part of Boston’s public transit system, with more than 700,000 trips each weekday. It is often referred to simply as the T (the “T” from MBTA—the Massachusetts Bay Transportation Authority).

The trains—or trolleys, as they’re sometimes called here—connect downtown Boston to communities within and near the city.

In this guide, we’ll talk about the basics of the system, and we’ll explore each line and where it can take you. Sit back and enjoy the scenery—each line runs at least partially above ground!

Getting to Know the Subway

A new Orange Line train at Assembly station

Wherever you’re going in Greater Boston, the T can help get you there. Here are some basics of the subway.

Taking Your Trip

Green Line customers wait at stop

Here are some things to keep in mind at your station or stop, when you board your train, and while on your trip.

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The Green Line

Green Line train in station

The Green Line serves an average of 93,000 customers each weekday. This light rail line has four branches to the west and north of Boston, connecting eight different cities and towns to the downtown area.

The Green Line got its name because it travels through Boston’s Emerald Necklace park system.

The Orange Line

Riders board and exit an Orange Line Oak Grove train at the station

The Orange Line serves an average of 96,000 customers each weekday. This heavy rail line runs south from Malden through downtown Boston and into the Jamaica Plain neighborhood. 

The Orange Line gets its name from its route under Washington Street, which was formerly named Orange Street, via Downtown Crossing, Chinatown, and Tufts Medical Center.

The Red Line

Customers wait to board Red Line

The Red Line serves an average of 122,000 customers each weekday. This heavy rail line runs south from Cambridge into Boston and South Boston, and branches into two sections south of JFK/UMass. The Braintree branch travels through Quincy (on the South Shore), and the Ashmont branch travels through Boston’s Dorchester neighborhood. From Ashmont, the Mattapan Trolley offers light rail service to Milton. 

The Red Line got its name because it travels through Harvard University, home of the Crimson.

The Blue Line

Blue Line in station

The Blue Line serves an average of 39,000 customers each weekday. This heavy rail line travels from Revere, on the North Shore, into Boston, where it ends near the historic Beacon Hill neighborhood.

The Blue Line got its name because it travels underneath Boston Harbor and along the Atlantic Ocean.

Planning an Accessible Trip

Rider in Wheeled Mobility Device Exiting Blue Line Train with Bridgeplate

Many subway stations are accessible to people with disabilities, and we offer trip planning assistance to help you get the most out of your journey on the MBTA. 

If you are 65 or older or a person with a disability, you may be eligible for reduced fares.

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Fare Calculator

Choose your origin and destination to calculate your fare with our Trip Planner.

There was a problem performing your search; please try again in a few minutes.

More Guides

Visitor's Guide Clickable Graphic
Bus Guide Clickable Graphic
Purple striped graphic with
Yellow, light blue and navy waves with white vertical lines

View all guides