0. –Ranked from the most severe
1. light rail stations become cold and a health hazard esp. during the long wait off peak hours. While waiting in the cold, I once felt impoverished living in Bayonne instead of JC. See separate post tips: light rail ] winter
2. NJ trains can hit frequent delays — unpredictable!
   • Nirav said he only count delays exceeding 20 minutes. About 25% – 30% of trips hit such delays. Often due to hot weather!
   • On a Friday before a long weekend, there are often train cancellations.
   • Rahul said NJ trains are worse than NYC subway, in terms of punctuality.
3. train frequency drops badly after peak hours.
4. When PATH is delayed, it can become too tough to squeeze in at Newport station.
5. Once a while I have seen trains departing too early, so I must reach platform a minute in advance.
6. no seat on
   • light rail
   • PATH
   • some peak hour commute trains

This post is mostly about weekday commutes. More than 50% of the weekends, there will be some train services severely limited.