The Healey administration said Monday that it’s submitted applications for more than $2 billion in federal funding for a quartet of infrastructure projects stretching from Cape Cod to Williamsburg.

“From day one, we said our administration was going to compete for the unprecedented level of federal funding opportunities available to support infrastructure projects across our state that are crucial to our communities, economies, and environment,” Gov. Maura Healey said in a statement. “These ambitious applications represent an important step forward toward delivering on that promise.”

Funding for the projects will come from a trio of federal grant programs administered by the U.S. Department of Transportation, according to Healey’s office. The administration had until Monday to submit its applications.

Here’s a look at those projects, and some of their details.

Cape Cod Bridges: The application the Democratic administration submitted Monday seeks $1.45 billion in federal aid that would allow the commonwealth to immediately begin work on the replacement of the Sagamore Bridge and lay the groundwork for the rebuilding of the Bourne Bridge. In its statement, Healey’s office said it “continues to advance the permitting and design of both bridges.”

Healey’s office announced last week that it was pivoting away from seeking funding for both bridge projects to just the Sagamore Bridge, State House News Service reported. The cost of the project has soared from $1.5 billion in 2019 to more than $4.5 billion today.

In an interview with the Boston Globe, which first reported the change in approach, Healey said last year’s failed grant application under former Gov. Charlie Baker was “dead on arrival,” State House News Service reported.

The administration earmarked $262 million for the bridge replacements in its 2024-2028 Capital Investment Plan, with the goal of eventually dedicating $700 million in funding.

Allston I-90 Multimodal Project: The administration said Monday that it, in collaboration with Boston city officials, is seeking $200 million in federal assistance to make improvements along Interstate 90 that will “meet the needs of motorists, pedestrians, cyclists, and public transit riders, while supporting the growth of the local economy.”

The project, as it’s currently envisioned, will reconnect Allston to the Charles River Waterfront, will improve pedestrian and biker access to the Paul Dudley White Path, and reduce the number of crashes along the corridor, the administration said.

Also, as a part of the project, a planned MBTA West Station would provide connections to commuter rail, buses, shuttles, and bikshares.

The project is a “once-in-a-generation opportunity to improve the lives and livelihoods of families all across our city and region with safer roads, access to jobs, and new parks and housing,” Boston Mayor Michelle Wu said in the statement. “In restoring the neighborhood connections lost to hulking highway infrastructure decades ago, Allston will be home to new spaces for community and access to the Charles River, along with a transit hub to serve the entire region.”

Read More: Worcester commuter rail service could get a boost after MBTA finalizes land deal

North Station Renovation and Draw 1 Bridge Replacement: The MBTA is seeking $672 million in grant funding for the construction phase of the North Station Renovation and Draw 1 Bridge Replacement Project, according to the administration.

The bridge carries all of the T’s commuter rail traffic on Boston’s North Side “across the Fitchburg, Lowell, Haverhill, and Gloucester/ Newburyport Lines,” according to the administration. It’s the last crossing before the trains terminate at North Station. And it’s a “critical asset” for Amtrak’s Downeaster service, the administration said.

“The project to replace the North Station drawbridge is crucial to ensuring that we can safely and reliably provide train service in and out of North Station. It will allow us to operate trains more efficiently as we expand the number of tracks across a new bridge,” MBTA General Manager and CEO Phillip Eng said.

Williamsburg Route 9 Reconstruction: Finally, the administration said it’s seeking $44 million in funding for the reconstruction of Route 9 in Williamsburg. The money will allow the commonwealth to provide critical upgrades to the highway, which the administration describes as a critical freight route linking eastern and western Massachusetts.

“This grant application is an example of the Healey-Driscoll Administration’s commitment to strengthening connectivity between rural communities and the rest of the state, as well as improving safety and supporting economic growth for Western Mass,” state Rural Affairs Director Anne Gobi said