The Cummuter trains that run to the city’s run every 30-60 minutes. During rush hour its 15. The River line trains were not built in America, they were transported by plane from Europe in the early 2000s.
Thank you for correcting my observations. I know how frustrating it is when somebody from far away gets something wrong about the railway system you're so familiar with. I should have investigated things a bit more. I just assumed that because the River Line received subsidies the trains were partially built in USA. I travelled a bit on the Pascack Valley Line and that has quite poor frequency during the day, but high frequencies during rush hour. Other lines are a bit more regular.
