This one surprises me because it seems far more common to me that cars hold up traffic than bicycles. When you look at images of traffic jams it's almost always other cars in the way, not bicycles.
I suppose maybe it's a city/countryside thing? Cars are great at long straights, but they take forever to safely clear an intersection compared to a bicycle -- and they block most of the road while they do.
I suppose maybe it's a city/countryside thing? Cars are great at long straights, but they take forever to safely clear an intersection compared to a bicycle -- and they block most of the road while they do.