Impossible to answer, I know how much it varies with two trucks that both do 63mph because some drivers make wise use of every minute of every night and some drivers waste so much time it is not funny. Theoretically I suppose it would be about twenty five minutes, but the most important part is that this might leave you with time to run an Appleton or Minneapolis as a second load instead of going to bed in Tomah. That is where the driver and the company would benefit greatly. Plus contrary to managements opinion, it is incredible how much easier it is to stay awake when you are driving 68 instead of falling asleep doing 63 watching all the smart LTL company drivers flying by you. Many more guys run into the back of other trucks and almost die like the YRC driver ten days ago and maybe they will catch on that driving 63 in those smooth riding Freightliners with no radio to help keep you awake is just a recipe for disaster. But what do I know....I didn't attend one of those fancy colleges!