A few things I wanted to say:

1. I doubt super duty diesels, or semis, etc will ever get the same hybrid system as cars currently do, it just wouldn't make much sense. The current hybrid system utilises braking power, and uses it to accelerate. Very good for city driving. Not going to help and when your driving down the highway and requiring a constant high amount of power. What the super duty needs, is maybe a hybrid steam system to recover exhaust heat and turn it into usable power. If the engine sheds roughly 50% of the burned fuel as heat, there is a lot of room for improvement.

Maybe use butane boiled from the coolant and exhaust, to drive an auxilary closed loop piston engine.


2. Trains, are probably the most effecient machine in the world. Tons of fuel burned, sure, but with the steel wheels on steel rails, the amount of fuel burned per pound per mile, is ultra low.
Rail transport is absolutely amazing, and I think is hampered simply by the time it takes to transport some items.