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Maryland B&P Tunnel
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Maryland Department of Transportation

Baltimore and Potomac Tunnel

Preliminary Engineering Work

Cost Estimate: $60 million


The B&P Tunnel is located under Baltimore just south of Penn Station. It was constructed in 1873 and is at the end of its useful life. Replacement and future expansion of the existing tunnel is needed to support safety and capacity improvements.

One-fifth of Amtrak’s passenger trips and one-third of its ticket revenues depend on travel through Baltimore, and the tunnel is critical to commuter and freight operations that support states all along the Northeast Corridor. The B&P Tunnel is identified as a critical chokepoint on the NEC.


Preliminary engineering is scheduled to be completed in September 2012.

"The upgrade of the BWI MARC/Amtrak Station is a critical component of our MARC Growth and Investment Plan. The additional tracks, platforms and new rail station building are essential to improving customer service and increasing our ability to move Marylanders more efficiently by rail and motivate them to get out of their cars and use transit instead.”
-Maryland Secretary Beverly K. Swaim-Stanley

Additional Info:
Link to Project
News Release on the Project

ContactNicole Katsikides, Director, Office of Freight and Multimodalism, Maryland Department of Transportation, 410-865-1225,