The MTA board will vote Wednesday on $32 billion worth of upgrades as part of its five-year capital plan.
According to MTA documents, the plan would include connecting Metro-North service to Penn Station, and add four Metro North stations in the Bronx.
Subway system updates are a large part of the plan.
The upgrades include replacing 940 cars that have been on the rails for decades, as well as cars on the Staten Island Railway.
The plan also funds the second phase of the Second Avenue Subway project.
Documents say the MTA still needs to secure funding for about half of the capital plan.