[HourglassFR]

I have absolutly no inside knowledge but my guess is that the loop and the vehicules inside it are more akin to a mini railway network with weird trains than roads with cars. As such the regulations are not the same and in particular the automatic features of the cars are not considered railway safe.

[londons_explore]

If a human crashes, that's human error and politicly not really an issue.

Whereas if autopilot crashes then suddenly politicians will be forced by voters to make laws and take action.

I could totally imagine Tesla themselves have asked for these restrictions.