Airports and supermarkets
1. Show that all your air-side vehicles (buses, tractors, catering vans etc) can run autonomous. Nice safe pedestrian free controlled and mappeable environment without potholes (one hopes)
2. Build an autonomous supermarket trolley that can navigate Tescos on a Saturday morning without killing a higher percentage of shoppers than the normal attrition rate.
3. Then test it on the road.
4. But make the AI car pass a normal UK driving test before it is allowed out without an in car safety driver and L plates. The whole thing. Real examiner, real roads, 'stop when i slap the dashboard', 3 point turns etc.