Skanska has, in a joint venture with Fay Construction Co., signed a contract with CSX Transportation for the Howard Street Tunnel Clearance Program in Baltimore, Maryland, USA. Skanska will include its share of the contract worth USD 174M, about SEK 1.9 billion, in the US order bookings for the fourth quarter of 2023.

The modernization of the historic Howard Street Tunnel will emphasise the accommodation of double-stack trains and ensuring the tunnel's continued relevance. Work includes lowering and tunnel enlargement techniques across the 2.7-kilometre (1.7-mile) expanse of the Howard Street Tunnel to increase the tunnel height from 5.8 to 6.4 meters (19 to 21 feet). Additionally, drainage improvements will be made throughout the track.

Work commenced in August 2023 with expected completion in June 2027.