Autonomous vehicles are already successful but you are unlikely to meet one because the successes are in the upper atmosphere, open cast mines, nuclear power stations, underwater and in other relatively inaccessible places.

Hybrid vehicles are already big business from hybrid cars, buses and trucks to outdoor forklifts, even hybrid tugboats.

To benchmark new technology for electric vehicles it is vital to look at all of the off-road, on-road, water and airborne e-vehicles.