President Biden’s proposed budget includes $400 million in funding for the next phase of the Second Avenue subway, the White House said Monday.

The money, which must be approved by Congress, would go toward engineering and planning for the project and give the MTA the opportunity to apply for more funding in the future.

The $6.9 billion subway extension would add stops at 106th Street, 116th Street and 125th Street by utilizing 16 blocks of existing tunnels built in the previous century. Gov. Kathy Hochul pledged in November to get the effort underway at some point this year.

New York will be able to apply for additional funds from the president’s budget as part of a separate process, according to Senate Majority Leader Chuck Schumer’s office, which added that about half of the project is eligible to receive federal money.