The Northeast Corridor Express Train, commonly known as the Acela, is an express train service that operates along the Northeast Corridor of the United States. It is operated by Amtrak and runs between Washington, D.C. and Boston, Massachusetts. The Acela offers high-speed rail service with speeds up to 150 mph, making it one of the fastest trains in the United States. It also offers amenities such as Wi-Fi, power outlets, and comfortable seating. The Acela is a popular choice for travelers looking for a fast and convenient way to travel between major cities in the Northeast.