You may well be having a laugh but when I was a bus driver somebody did actually write in and complain that because my bus was (unusually) on time she missed it.
My Manager looked at me and said "I dont know whether to castigate or congratulate you, either way dont do it again, I think", he then burst out laughing!![]()
I can well believe it. Systematic lateness is something people can factor in to their journey times, random lateness is harder to accommodate. Once or twice a week my wife will have to chair a committee or something similar that demands she's sitting at her desk by 9 o'clock. If she went by the timetable she'd be ten minutes early for work, pretty much ideal, but experience has shown she'd probably be a few minutes late, and no one wants to be last at the meeting, especially if you're chair. So a couple of times a week she catches the train an hour earlier, which is late much less often, getting her to her desk an hour and ten minutes too soon.
It seems the service is mostly running to time now, but years of the old regime means she tends to catch the earlier train even though the new one would probably get her to work on time. Sacrificing an extra hour in bed, especially in winter, on a will-it-or-won't-it be late basis does nothing for her stress levels!