Public Transport

I'm generally against night trains. They only work well when you can get on just before your normal bedtime, sleep undistributed for 8 hours and then get off. That means you lose one great advantage of trains: all the places you can stop on the way.

Mean while night is always going to be low demand so it is the ideal time to shutdown one of your two tracks (assuming two tracks, which isn't always a given!) and do maintenance on it, thus ensuring your daytime trains are more reliable.