Italy has the same stop/go issue. Roundabouts are the main cause, with jammed zip merges coming in second. Both allow only a short burst of cars to pass when at

Italy has the same stop/go issue. Roundabouts are the main cause, with jammed zip merges coming in second. Both allow only a short burst of cars to pass when at full capacity, which backpropagates into the queue as multiple stop and go.