Nonsense. No one using public shadow and safety driving will get close to L4. And will kill thousands needlessly when they start training accident scenarios. The solution is to switch 99.9% of that to aerospace/DoD simulation technology. (Not gaming architecture based systems since they have significant real-time, model fidelity and scaling/loading issues).

SAE Autonomous Vehicle Engineering Magazine-End Public Shadow Driving

https://www.nxtbook.com/nxtbooks/sae/ave_201901/index.php

Common Misconceptions about Aerospace/DoD/FAA Simulation for Autonomous Vehicles

https://medium.com/@imispgh/common-misconceptions-about-aerospace-dod-faa-simulation-for-autonomous-vehicles-2b3ad84b0aa1

Using the Real World is better than Proper Simulation for Autonomous Vehicle Development - NONSENSE

https://medium.com/@imispgh/using-the-real-world-is-better-than-proper-simulation-for-autonomous-vehicle-development-nonsense-90cde4ccc0ce

How Driverless Vehicle Makers Should Prove their Technology Works https://medium.com/@imispgh/how-driverless-vehicle-makers-should-prove-their-technology-works-2131f52b4c72

The Hype of Geofencing for Autonomous Vehicles

https://medium.com/@imispgh/the-hype-of-geofencing-for-autonomous-vehicles-bd964cb14d16