We will be traveling from Penn Station Newark to Penn Station New York. Back and forth for 4 days. My question is: are there times (like rush hours) that it cost more to ride the Red Line (North East Corridor)? A couple years ago when we were on the Rail we heard something like that. We did not know about it and the conductor never came and collected our tickets but we want to be prepared if this is true...as we plan to buy all our tickets in advance and we want to have enough.........thanks.