But professor ST, your lesson is deeply flawed. Take a short walk with me, and I'll try to help you to see.
1st When I was hired, I was told to expect MORE than 40 hrs/week. They obviously couldn't guarantee, but the assurance was given that MOST of the time I'd likely get more. And since that has, in fact, held true for over 20 yrs, I'm fairly certain that I am not am isolated case. Other than those vacation checks, I've had less than a dozen 40 hour weeks in all those years. Maybe only 1/2 dozen...
Now lets talk about this road expectation. Just so you know, I've done that too. Your MYTH "sounds" plausible on the surface, until we look a little closer. I know of no LTL road driver told to expect to work 70 hrs/wk. Certainly not at AF or FedEx Freight.
Up until 2003, the legal limit was 70 hours in EIGHT (8) days, not per week. Only with the advent of the 34 hour restart provision, is that even possible. Might it happen, where a person runs the max 14/day for 5 days working 70 hours? It might happen on occasion. Also, Weekends? Nonsense. That would be optional. Holidays too? I've never seen that be mandatory...
Again, the NORMAL/AVERAGE (LTL) road driver does NOT work 70 hrs/wk, day AND night, AND weekends AND holidays. Your mythical road driver does not exist. He is the stuff of legends. A myth. Even if he did exist, that would not justify having a lesser benefit for city drivers. City drivers occasionally do 14 hour days too. Did you know that?
The annual method for figuring vacation benefits takes into account all extremes in work schedules, from the easiest to the most grueling. It is the Far Superior Method. FACT.