This has probably been posted before. Market Street in San Francisco before the 1906 earthquake.

It's interesting how every vehicle is going at a fast walking pace. Cable cars, horse wagons, cars, bikes, pedestrians. So they all just make their own path. (A few cars near the end are speeders, going 15 or 20 mph)

Modern bicyclists would be way too fast for this road. But maybe the cobblestones would slow them down to match everyone else.