Carries less people than a '70s People Mover pod, is less efficient, and has all the complications of a system that requires its own right-of-way AND has to operate in road traffic.
Also, if you have a battery fire in that tunnel, you are going to die. There's nowhere to go.
Tesla Self Driving through the Vegas Loop!
Did the whole ride with no human input or intervention from pick up to drop off. This is the future!