As a comparison, I just read that they are testing an autonomous tram in Potsdam, Germany. This runs on a dedicated track, rather than the open street, but there are numerous road and pedestrian crossings on the route. The tram uses similar LIDAR etc to driverless cars, but will not have to worry about steering (being on rails), only braking to avoid any obstacles. The testing will include a driver at the helm for emergencies. There have been driverless trains for years of course (London's Dockland Light Railway, for instance), but these are run on fenced-off tracks where there is minimal chance of anyone or thing on the tracks.
The point is that the rail industry is very careful with safety issues and tests everything exhaustively. Unlike some of these new technology set-ups like Tesla, Google, Waymo and whoever that seem to think it is OK to dump their products on the public road and use the unsuspecting (and unconsulted) public as crash test dummies. If it was the rail or aviation industries, their regulators would be requiring thousands of hours of fault free testing before allowing any new stuff to be released onto the public. But the likes of Tesla can fit a load of immature autonomy to their cars, tell the suckers that buy them that they can doze off at the wheel, and then when they do so and crash, Tesla denies any responsibility.
Edited by BRG, 16 December 2018 - 19:41.