Sweden switches from left to right-hand traffic, Stockholm, 3 Sep 1967

Source

TheRic0Suave: why though?

Sandy-Balls: Why weren’t this changes done during the night? evry time I see a photo like this is during the day when there is trafic.

47c7oIbsCuxW: [99% Invisible has a pretty good podcast regarding this day.](https://99percentinvisible.org/episode/h-day/)