"The bus always seems to be heading in the wrong direction"

Reading " The fallibility of human reason in everyday life" recommended by Tabula Rasa a few months ago, I do not find it as convincing as "stumbling on happiness" by Dan Gilbert or " Mistakes were made (but not by me)" by Tavris and Aronson. On page 67, Thomas Gilovich says " The belief that "the bus always seems to be heading in the wrong direction" is particularly interesting in this regard because of an important asymmetry between positive and negative events: Certain kinds of negative events can accumulate in ways that positive events cannot. I can become convinced that all the buses are headed in the wrong direction by observing quite a umber headed in the wrong direction before I encounter one going in my direction. Note that the opposite cannot happen..... If a bus is going in my direction, I take it. Because of this asymmetry, we can expect a certain kind of "bad streak" but not a complementary streak of good fortune."
There may be an element of this but there can also be real asymmetries as this well-known example shows. Suppose that the buses are going at one hour intervals in both directions but depending on one's bus stop, the following asymmetry can arise. At some stop (far from the mid point) there may be a gap of 50 minutes between the times when my bus arrives and the one in the other direction arrives and only 10 minutes for the other gap. If I go to catch the bus arbitrarily without checking the timings, it is five times more likely that I will notice the bus going in the opposite direction.