Acela

The Acela ( ə-SEL-ə; originally the Acela Express until September 2019) is Amtrak's flagship passenger train service along the Northeast Corridor (NEC) in the Northeastern United States between Washington, D.C., and Boston via 13 intermediate stops, including Baltimore, Philadelphia, New York City, and Providence. Acela trains are the fastest in the Americas, with a top speed of 160 miles per hour (260 km/h), qualifying as high-speed rail, but only for about 40 miles (64 km) of the 457-mile (735 km) route. In fiscal year 2025, Acela carried more than 3.1 million passengers, second only to the slower and less expensive Northeast Regional, which had over 12 million passengers. Ridership was down from the pre-COVID-19 pandemic high of 3,557,455 passengers in 2019. Its 2025 revenue of $570 million was around 20.6% of Amtrak's total. Acela operates along routes that are used by slower regional passenger traffic, and only reaches the maximum allowed speed of the tracks along some sections, with the fastest peak speed along segments between Mansfield, Massachusetts, and Richmond, Rhode Island, as well as between South Brunswick and Trenton, New Jersey. Acela trains use active tilting technology, which helps control lateral centrifugal force, allowing the train to travel at higher speeds on the sharply curved NEC without disturbing passengers. The high-speed operation occurs mostly along the 226-mile (364 km) route from Pennsylvania Station in New York City to Union Station in Washington, D.C., with a fastest scheduled time of 2 hours and 45 minutes and an average speed of 82 miles per hour (132 km/h), including time spent at intermediate stops. Over this route, Acela and the Northeast Regional service captured an 83% share of air/train commuters between New York and Washington in 2021, up from 37% in 2000. The Acela's speed is limited by traffic and infrastructure on...