Those 1000 people don't have to be served by 1000 privately owned single occupancy vehicles. When they are inputting their destination before departure, a robo taxi can deliver 6-8 people with similar destinations door-to-door for a fraction of the cost of a private vehicle, the same comfort level, but occupy hardly more road space then 70-80 seat transit buses.
- somehow find other people "with similar destinations"
- somehow synchronise the time they leave work
- figure out who calls and pays for the robo-taxi
How is that effecient?
And, once again, that's just one office on a street of a dozen or so office buildings. Across is a building that houses 10 or so different companies. So I guess those people should also somehow group themselves across companies?