We have a similar thing, it's just the Art Fair, not exactly the Olympics! but every summer for a week, half the downtown streets are closed and a lot of the close-in parking is taken over by the artists. T always worries about me as his office is right in the middle of it all, but I just take my bus as usual. Your public trans route sounds a lot more complicated than mine, but it might be better than getting stuck in traffic? Have you considered taking a dry run? I love my bus.