[close04]

> important regulation is truck speed limits, because drag grows

No I just meant that drag was a second thought when the regulation was conceived on either side of the ocean. The regulation was not created "because of drag". The main driver was road safety. Efficiency and pollution were secondary. There are other ways to achieve them like improving aerodynamics or power trains, and much of this cost is paid by the freighter alone. This is why speed limits didn't increase as trucks got more efficient and drag went down. Because there's no way to reduce the potential energy of a 40-50t vehicle (or up to almost 90t Finland) travelling at 130km/h.

[masklinn]

> No I just meant that drag was a second thought when the regulation was conceived on either side of the ocean.

Again, not relevant.

> The regulation was not created "because of drag".

That is not a claim I made. Please do not involve me in your fights against the ghosts you made up.