New Brunswick Station – Improvements to the elevator system; an extension of the eastbound platform for extra boarding capacity; significant rehabilitation of the station's exterior brick façade; installation of new lighting, windows, HVAC system, and escalator; and a paint refresh.

Elizabeth Station – Upgrades include the addition of two new elevators; updating the existing two elevators; the addition of ADA-complaint ramps; and building new high-level platforms, which will also increase the platform area for passengers.

Trenton Transit Center – Replacement of damaged timber boards that are located past the yellow warning strip on the platform to improve customer safety.

Princeton Junction Station – General platform repairs to improve customer safety, including the refresh of platforms that have deteriorated for decades from exposure to weather and de-icing agents. This includes reinforcing the platform supports, patching concrete, repainting the yellow warning strip, and general repair of the stairs and handrails.

In February 2019, the state of New Jersey, Amtrak, and NJ TRANSIT announced their "Power in Partnership" campaign at an event at New York Penn Station, showcasing a joint commitment to improving the customer experience of the traveling public. At the event, Amtrak and NJ TRANSIT also announced they came to a financial settlement that will reinvest all of the funds that came from this and other agreements into existing and future joint Northeast Corridor infrastructure projects that benefit both Amtrak and NJ TRANSIT. One joint project is the Portal Bridge, as both organizations highlighted that they are ready to begin full construction on Portal North as soon as federal funding is secured.