I'm sure you're careful but just please be super cautious when passing cars on the right when you're right at those side streets. I've seen too many videos of a car making a sudden right turn with no signal and the cyclist is right there and gets mowed down. And with traffic like that it's probably more likely to happen because someone will get impatient and try to make a quick exit from the line of traffic by going down a side street. Passing that much traffic moving that slowly, it might actually be better to pass along the center line of the road to avoid potential right hooks.