Maybe, but here in the USA you can travel hundreds of miles of bumper-to-bumper. I remember driving from Pittsburgh to Chicago bumper-to-bumper all of the way. That drive alone comes close to the entire length of Germany. I've encountered the same driving from Chicago to Detroit, from Boston to New York, or Boston to Niagra Falls. An extra lane or two would relieve congestion, allow for greater safety, and make for a more timely arrival.
Years ago, Boston expressways were so crowded, they changed the laws, allowing motorists to drive on the shoulders.