Amtrak releases the Baltimore & Potamac Tunnel Replacement renderings.

Amtrak has begun early construction activities as part of the B&P Tunnel Replacement Program. The first project kicked-off in March 2023 and includes replacing aging wooden ties with new concrete ties, installing new rail and completing track drainage improvements. These upgrades will enable high‐speed operations on all four tracks along this track segment.

At nearly 150 years old, the B&P Tunnel is Amtrak’s oldest tunnel on the Northeast Corridor, connecting Baltimore to Washington, D.C. The $6 billion program will eventually be advanced by Amtrak and its partners by utilizing federal funding provided by the Infrastructure Investment and Jobs Act (IIJA), also known as the Bipartisan Infrastructure Law (BIL). The program is comprised of several investment projects to construct new bridges, rail systems and track, an ADA-accessible West Baltimore MARC station and the new Frederick Douglass Tunnel, which will include two new high-capacity tubes for electrified passenger trains.

all info is courtesy of Amtrak.

https://media.amtrak.com/2023/05/bp-tunnel-replacement-program-renderings/