The 141-year-old Baltimore and Potomac (B&P) Tunnel is a major bottleneck on the Northeast Corridor, but Amtrak, the Maryland Department of Transportation (MDOT) and Federal Railroad Administration (FRA) are conducting a study to examine alternatives to improve or replace the tunnel.
The two-track B&P Tunnel is used by Amtrak, Maryland's MARC Commuter Rail trains and Norfolk Southern freight trains. The track geometry of the outdated tunnel creates a low-speed bottleneck impacting approximately 85 Amtrak trains, 57 MARC commuter trains and one to two freight trains each day.
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