The Maryland Transportation Authority Board gave preliminary approval Thursday to a long-range plan that would replace the current Chesapeake Bay Bridge spans with two parallel spans that would add four driving lanes as well as a shoulder lane in each direction.
The “alternative C” plan would also raise the bridge height to allow for larger cargo ships to pass under and would cost between $16.1 billion and $17.6 billion if the final design includes “shared-use paths” for bicycles and pedestrians. Dropping that option would save about $1.3 billion from the final cost, according to state estimates.
Choosing the alignment and size of the replacement bridge is just another step in a years-long planning process, that kicks off several more years of hearings and planning on the project that would not begin construction until 2032 at the earliest. ButMdTA Executive Director Bruce Gartner was happy with the progress of the Bay Bridge replacement project that has been decades in the making.
“It’s been an incredibly successful development to get to this point” Gartner said. “This is just another step in the process … But this is a kick-off of really needing to get citizen input on that project.”
Melissa Williams, MdTA’s director of planning and program development, said a new bridge is needed due to the “aging infrastructure” of the current William Lane Preston Jr. Memorial Bridge. Besides the current lanes — two eastbound and three westbound — not being enough to meet current traffic demands, the lack of shoulders does not allow for emergency vehicles to access the bridge easily.
The new design would build a four-lane eastbound span parallel to the current eastbound bridge, which would then be torn down, and the process would be repeated for the westbound bridges. The bridge would also be raised to a 230-foot vertical clearance to allow larger ships through, matching the height of the proposed replacement for the Francis Scott Key Bridge in Baltimore.
Alternative C was the least costly of the seven alternative designs that were under study. Those costs, from $14.8 billion to $17.6 billion, “are planning-level costs estimated in 2025 dollars. These are very preliminary dollars,” Williams reminded the board.
The design plan under consideration also had the least environmental impact compared to other design plans presented to transportation officials. The new bridge could yield between $17 billion and $23 billion into the local economy, and bring in over 61,000 jobs during construction.
MDTA voted unanimously to focus on Alternative C. The next step will be a report on the design’s potential environmental impact, which would be released in January 2026. There will be public hearings in February where Marylanders and other stakeholders can respond to the report.

MDTA Chair Samantha Biddle and board member William Cox consider a plan to replace the Chesapeake Bay bridge. (Photo by Danielle J. Brown/Maryland Matters)
A final decision on design construction is projected to occur in Spring 2028, with construction beginning around Summer 2032. Williams said it was too early in the project to estimate when completion of the new bridge would occur.
“We are still in the planning phase,” she said. “Once we get our designers on board and our construction team on board, the details of exactly how we move forward, and what the timing would be and the construction sequencing would be, will be ironed out.”
Consideration for the Chesapeake Bay bridge replacement comes at a time when state officials are also working to replace the fallen Francis Scott Key Bridge.
“It’s rather daunting to think about taking on construction of two very large bridges in short periods of time,” said Board Member Cynthia D. Penny-Ardinger. “One due to disaster, and one that’s been in the works for a very long time.”
But she and the other board members were ready to take on the challenge.
“We have a great team, and we can do hard things,” said Chair Samantha J. Biddle. “We can walk and chew gum at the same time.”
by Danielle J. Brown, Maryland Matters
December 18, 2025
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