On 11/03/2019 17:37, harry wrote:
There are no steep hills on motorways.
The regenerative braking is adjustable.
Set according to terrain an bends in road.

That's John's point.

At all times on a motorway you are putting energy in to overcome the
(mostly air) drag. There aren't any steep hills, nor any sharp bends
that you'd slow down for and get energy back.

Andy