West of the Tappan Zee, the 680,000 residents of Rockland and Orange counties currently have very limited mass transit to New York City via NJ Transit's Port Jervis Line and Pascack Valley Line commuter rail services or Coach USA's Rockland Coaches bus services.
The bridge plan includes as an objective merely, "Providing a crossing that does not preclude future trans-Hudson transit services."

A proposed bus rapid transit system using the new bridge was shelved as too expensive.
However, the bridge was structurally built for expansion with BRT and/or commuter rail at a later date.
The existing Tarrytown station of the Metro-North Railroad's Hudson Line is located about 2,000 feet (610 m) from the new bridge's eastern landing.
In 2011, the state estimated that a bus connector to the station would cost about $151 million, about 3 percent of the bridge's projected cost.
Responding to widespread concerns about the lack of new public transit service, bridge planners agreed only to build one "dedicated express bus lane" in each direction for use during rush hour.
Construction on the new bridge's bus lanes finished in 2020, leaving one bus lane in each direction.
West of the Tappan Zee, the 680,000 residents of Rockland and Orange counties currently have very limited mass transit to New York City via NJ Transit's Port Jervis Line and Pascack Valley Line commuter rail services or Coach USA's Rockland Coaches bus services. The bridge plan includes as an objective merely, "Providing a crossing that does not preclude future trans-Hudson transit services."
A proposed bus rapid transit system using the new bridge was shelved as too expensive. However, the bridge was structurally built for expansion with BRT and/or commuter rail at a later date. The existing Tarrytown station of the Metro-North Railroad's Hudson Line is located about 2,000 feet (610 m) from the new bridge's eastern landing. In 2011, the state estimated that a bus connector to the station would cost about $151 million, about 3 percent of the bridge's projected cost. Responding to widespread concerns about the lack of new public transit service, bridge planners agreed only to build one "dedicated express bus lane" in each direction for use during rush hour. Construction on the new bridge's bus lanes finished in 2020, leaving one bus lane in each direction.
Tappan Zee Bridge (2017–present)