The general rule of going down a hill at the same speed as you went up is just that, a general rule. Not all hills have the same incline on both sides, nor as long a gradient. In the west, there are many passes on the interstates that start in the high desert at say 2500 feet above sea level and climb to 4500 feet at the pass and then descend down to say 800 feet on the coastal side. The climb may be 3 miles long and the descent could be 8 miles. Or the climb could be at a 6% grade and the descent longer at a steady 4%. Or vice versa if you are going the other way of course. So the guideline is just that, and must not always be adhered to.

And, if you are climbing a steep grade at 40 mph because that is all the horsepower you have then going down at 40 is not required or sensible in all cases. Descending at the posted speed limit of 55 or 60 or 65 may well be perfectly fine, depending on traffic and weather conditions.

Part of the POG Code of Ethics should be an admonition not to drive like a bunch of FuddyDuddys! For that I could join the PrevostProuds , FMCA, or whatever group Liberty promotes.

Peter vS
94 Marathon XLV

My GPS says it went 88 mph at one point down a long straight hill, not towing anything. How fast will it go on a flat straight road?