Yeah, guess I am kinda speculating out to what seems to me like the natural evolution.
Nevertheless and AFAIK, Tesla cars will be used. In your first link, it states: "Standard AEVs [Autonomous Electric Vehicles] are Tesla Model X and Model 3 vehicles. High-occupancy AEVs use a modified Tesla Model X chassis to transport up to 16 passengers with both sitting and standing room."
Or am I misunderstanding what you mean by "no vehicle access"?
No external/ private vehicle access. Just the custom pods you mentioned.