Japan possesses the world’s most sophisticated railway system:
https://www.cnet.com/roadshow/news/8-hours-across-japan-by-train/
https://www.cnet.com/roadshow/pictures/8-hours-across-japan-by-train-pictures/
https://www.theguardian.com/world/2015/apr/21/japans-maglev-train-notches-up-new-world-speed-record-in-test-run
https://www.cnet.com/roadshow/pictures/8-hours-across-japan-by-train-pictures/
https://www.theguardian.com/world/2015/apr/21/japans-maglev-train-notches-up-new-world-speed-record-in-test-run
On a side note,
If the ultimate goal is to ferry people from point A to point B in comfort and safety, then a great railway system is superior to autonomous/driverless car systems any day. The hoopla surrounding driverless cars is a bit silly when one considers the underlying goal - which is still to move people around efficiently. From a physics standpoint, it is not very efficient system if you need a 2000 pound vehicle to transport one individual from point A to point B (even if the vehicle is self-driven).