Maybe going up a hill? They did mention they were driving a truck, it’s easy to have vastly different climbing speeds in that case.
Also, I would often go less than 20 down a pass during the winter because I didn’t have snow tires or chains, and was passed by plenty of locals doing 60+ because they were equipped for it.
Also, I would often go less than 20 down a pass during the winter because I didn’t have snow tires or chains, and was passed by plenty of locals doing 60+ because they were equipped for it.