After decades of discussion, the long-promised replacement of the Bourne and Sagamore bridges is finally moving forward — and the impact is starting to hit home.

With $1 billion in federal funding secured last summer for the Sagamore Bridge and eminent domain notices going out to homeowners earlier this year, the once-distant project is becoming a reality.

As Luisa Paiewonsky, executive director of the Megaproject Delivery Office at the Massachusetts Department of Transportation, said, “Yes! The bridges are coming.”

So, how soon will construction begin? Who will be affected? And what will the new bridges actually look like?

Boston.com breaks it down below.

The project

According to the Cape Cod Commission , the regional planning, economic development, and regulatory agency, the 90

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