It seems to me beyond doubt that what the driver did amounted to reasonable excuse. He acted according to the light of his own judgment, in good faith, in the interests of his passenger. He said that if he had taken the more congested route, the taxi might have had to wait and for every minute of waiting 90 cents would have been added to the meter. The passenger might have ended up paying more. Upon these facts I cannot see how the conviction based on his having no reasonable excuse can be sustained.