12 Jan 2019.
Amtrak is gearing up to introduce new high-speed Acela trains as it plans to spend billions of dollars in upgrades on the busiest U.S. rail corridor from Washington to New York. Upgrades include replacing an 1873 Baltimore rail tunnel with water infiltration issues that will cost US$4.5bn to and the 1906 Susquehanna River Bridge whose replacement is estimated to cost US$1.7bn. Amtrak is planning to start using new Acela trains starting in 2021. The railroad is buying 28 Acela train sets, eight more than it currently operates, using a US$2.45bn federal loan. It is also planning to buy a new fleet of trains for its slower Northeast Regional service in the middle of the next decade.
https://www.reuters.com/article/us-usa-amtrak/amtrak-works-to-modernize-speed-up-trains-in-busiest-us-rail-corridor-idUSKCN1P52JP