I'm pretty sure that centered position is entirely to get the low Cw value that they achieved. Someone else said that that cost-per-mile factor was pretty much the key factor from the entire presentation. However, they were very unclear as to what they did and didn't count in that number. Did they assume it'll be a convoy with only one driver in the first truck, which inevitably plummets the cost per mile per tonne down? Did they factor in the increased weight of the truck, leading to higher tolls? I don't think we get answers for that. That said...I would love for a progressive government to just subsidize electric trucks (or tax non-electrics) to push companies make the jump. Trucks are such a large contributor to pollution, and it's a boring task that begs for lanekeeping. By the looks of it they're definitely going to be much more safe than regular trucks, too.