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Dagen H

Kungsgatan, Stockholm, 3 September 1967, at or around the moment of transition at 5:00 AM, on the morning when Sweden changed from left-side traffic to right-side traffic[1]
Dagen H campaign logo
Left-hand traffic in Stockholm in 1966

Dagen H (H-day), today usually called "Högertrafikomläggningen" (lit. 'the right-hand traffic reorganisation'), was on 3 September 1967, the day on which Sweden switched from driving on the left-hand side of the road to the right.[2] The "H" stands for "Högertrafik", the Swedish word for right-hand traffic.[3] It was by far the largest logistical event in Sweden's history.[4]

Headlamp sold in Sweden not long before Dagen H. Opaque decal blocks the lens portion that would provide low beam upkick to the right, and bears warning "Not to be removed before 3 September 1967".
A pair of coloured gloves used in 1967 by Swedish authorities in order to remind drivers they should drive on the right as the traffic was changed
Sign at the border crossing in four languages reminding of the right hand drive in Norway
  1. ^ Ttnyhetsbyrn (26 January 2022). "Sidbyte genom kameralinsen" [Driving side switch through the camera lens]. TT:s blogg (in Swedish). Archived from the original on 15 September 2022. Retrieved 15 September 2022. Alt URL
  2. ^ Nilsson, Lennart (1 September 2017). "Så gick det till när Sverige fick högertrafik". www.expressen.se (in Swedish). Retrieved 14 August 2024.
  3. ^ McGregor, Conrad (1 November 2024). "Why do some countries drive on the left and others on the right?". www.worldstandards.eu. Retrieved 8 December 2024.
  4. ^ "Kommer du ihåg när Sverige fick högertrafik 1967?". Året Runt. 1 September 2017. Archived from the original on 7 December 2018. Retrieved 5 September 2017.
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