Brookhaven Town officials have completed a $1.4 million road-paving project in Mount Sinai.

In addition to milling and paving Shore Road and seven surrounding roadways, the project included the installation of two new so-called bio-retention areas — designed to trap pollutants — and a swale, officials said.

“The addition of the new bio-retention areas will successfully capture and treat runoff before it enters the [Mount Sinai] Harbor,” Town Superintendent of Highways Dan Losquadro said in a statement.

The paving also included portions of Mount Sinai-Coram Road, Old Post Road, Rocky Hill Road and several residential cul-de-sacs.

The highway department spent $900,000 on the project, designed to mitigate storm-water runoff. In addition, the state Department of Transportation provided a $555,000 grant.

New paving has been completed on Mt. Sinai-Coram Road in Mount Sinai, Dec. 8, 2016. Photo Credit: New paving has been completed on Mt. Sinai-Coram Road in Mount Sinai, Dec. 8, 2016.

“The investment we made on Shore Road results in greater safety for the public, in addition to improving water quality by capturing and treating runoff,” state Sen. Kenneth LaValle (R-Port Jefferson) said in a statement.

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“We’ve taken a big step toward making our streets safer and improving the water quality of Mount Sinai Harbor and the Long Island Sound,” Town Councilwoman Jane Bonner said in a statement.

In recent weeks, the highway department has announced the completion of a series of road projects ahead of the winter season.

There was a $150,000 project on Station Road that extended from Woodside Avenue in Yaphank to Horseblock Road in Medford.

Last month, the department finished a $1 million road-paving project in Selden. In addition to milling and paving Dare Road, Hawkins Road, Hawthorne Street, Hemlock Street and Magnolia Drive, the project required the installation of new sidewalks, curbs, handicapped-accessible ramps and basins.

That project received $264,000 in federal money through the New York State Department of Transportation’s High Priority Project Program. The highway department covered the remaining $720,500, officials said.

In October, the department completed a $300,000 road paving project in a Ridge neighborhood. The eight-road project included milling, paving and replacement of more than 5,200 square feet of aprons.