Spied this on Mashable. Here's a link to the Youtube video associated with the article:
https://www.youtube.com/watch?v=Dd3N9CFKe9M
The Mashable article goes on to say that the infrastructure to support the autonomous trams would cost just $2 million per kilometre, versus $102 million for a typical subway line.
Nice, but I wonder if this could work in Canada, where the white lines might be covered over with snow and ice in the winter months and therefore become invisible to the sensors on the tram.
I suppose a work-around might be possible by installing RFID-like sensors in the white lines that could transmit radio signals to the tram.
In any case, you'll still need dedicated laneways with barriers to keep the tram separated from other vehicles.