The renovation of a 130-year-old rail bridge that links New York City to its northern suburbs and Connecticut finally kicked off on Thursday, according to Governor Kathy Hochul.

The Metropolitan Transportation Authority, a state agency that operates the city’s subways, buses and commuter rail lines, began the first phase of the $590 million project upgrading the Park Avenue Viaduct that will reduce noise and vibration levels. The bulk of the cost, $500.9 million, is federally funded. The viaduct serves 98% of Metro-North Railroad trains, which travel into and out of Grand Central Terminal.