When the road is experiencing heavy traffic, expect the 2-wheels to be on the sidewalk. There were cases where bikes hit pedestrians because they were not expected to be on the sidewalk which is the domain of the pedestrians. I can't say it's only the cyclists here who are doing that because when we went to Ho Chi Minh, Vietnam, that's also the case. Motorcycles and bikes are common to see on the sidewalks. I guess we have to exercise our good manners and right conduct when on the road.