1. If my vehicle can be detached from the convoy, why even attach in the first place. Just get me to my destination as efficiently as possible. Also being dropped a block from your house doesn't really sell it.

2. Aren't AVs suppose to greatly alleviate the traffic problem on existing roads since AVs can/will coordinate efficiently. I'm actually surprised that the loop doesn't operate autonomously and requires drivers

3. Wouldn't flying cars be the ultimate 3D model, as oppose to digging limited tunnels.