Hi, ho! Hi, ho! etc...

You see these lines of workers walking off to work everywhere in the morning. What's had to convey, is that these lines are continuous, nonstop for about two hours in the morning.
People also work very late, and you see people going home from work at 9, 10 or even later in the evening. There are a lot fewer people in nonbusiness clothes on the trains that those casually dressed.