On Sunday, the nation's third-largest provider of bus, rail and light rail transit cut at least two trains from each line.
The cuts mean commuters might have a longer wait for trains or find cars more crowded.
The service cutbacks come after NJ Transit raised fares earlier this month to offset a budget gap.
Executive director James Weinstein says there was a 2.6 percent drop-off in bus, rail and light rail passengers in the first week of the fare hike. Officials had anticipated a drop in ridership of up to 5 percent.