....and Japan. Do we have a complete list yet?
I witnessed the Swedish change of traffic as a visitor. They spent a lot of time and effort prepping, rebuilding intersections, new signage, education, etc. and it was done without a glitch. Impressive.
Almost 30 years earlier, some countries on the Continent switched over, also without a glitch, but for a different reason. The Nazis marched in and said you vill drive on the right NOW! From what I heard as a kid, it was done instantly.