We have a massive fleet of these self-driving cars in my city. They are also stopping in dumb places and blocking traffic. Multiple times I've seen them sitting (waiting for a pickup?) just blocking an entire half mile of cars backed up blowing horns. Even today on my way to work, one stopped right in the middle of the street and wouldn't move, causing everyone else to drive into oncoming traffic to go around. They are not perfect drivers, far from it. They stop and start and seem to change their minds. They can't see to see or understand the road lanes. Why are these things allowed on the roads?

There are always strings attached. It part of the Defense Federal Acquisition Regulation. By law there are clauses related to worker healthcare, public transportation encouragement, etc. And this by law part of (every?) government contract: https://en.wikipedia.org/wiki/Federal_Acquisition_Regulation and you can view the clauses here https://www.acquisition.gov/dfars