Starting Sept. 7, the agency will launch a 90-day "Quiet Commute" pilot program.
It will bar passengers from using their phones in the first and last cars of certain weekday express trains on the Northeast Corridor.
Riders in quiet cars also will be asked to speak in low tones and switch off the sound on laptops, pagers, games and other electronic devices.
The quiet cars will be on trains that operate between New York and Trenton, Hamilton and Princeton Junction. Those trains were selected for the pilot program due to their relatively long trip times and high ridership.