I wonder if one of those international cities is Perth, Australia? We had a news report today that Perth is launching trials of a self-driving on-demand taxi service in April 2018:

http://www.zdnet.com/article/navya-bringing-driverless-vehic...

(I realize the trials aren't Uber, but if our government is getting ready to allow self-driving taxis, I imagine Uber would want to be prepared & ready to launch ASAP.)