Acela Express entered service on Amtrak’s Northeast Corridor in 2000 as the first modern American trainset designed specifically for high-speed intercity operation.
The original Acela fleet was built by a Bombardier–Alstom consortium.
Trainsets used power cars at both ends and passenger coaches equipped with active tilting systems.
Tilting allowed higher speeds through some curves without requiring the track to be straightened to the same degree as a new dedicated high-speed line.
The Northeast Corridor is shared with commuter and other trains and includes infrastructure built across many different eras.
Because of curves, bridges, tunnels, station approaches, and mixed traffic, Acela could reach its highest speeds only on limited segments.
The service nonetheless reduced travel times and became Amtrak’s premium product between Boston, New York, Philadelphia, Baltimore, and Washington.
The fleet experienced early technical problems, including cracking in brake components that temporarily removed trains from service.
A new generation of Avelia Liberty trainsets is intended to replace the original Acela equipment.
For TransitSatellite, the page should distinguish vehicle capability from corridor capability. A train capable of high speed does not make every mile of its route a high-speed railway.