On the other hand, these things see a lot more annual miles than consumer vehicles so the payback period should be shorter. I agree though, that probably it wou

On the other hand, these things see a lot more annual miles than consumer vehicles so the payback period should be shorter. I agree though, that probably it would require some kind of government involvement to get broad adoption. Also, I imagine it's easier to find extra space for batteries in the the trailer than the tractor. Regenerative breaking seems like a more important improvement though.