Overview
Road signs in Sweden are regulated in Vägmärkesförordningen, VMF (2007:90), and are to be placed 2 metres from the road with the sign 1.6 m from the base for motorized roads. Except for route numbers, there are a maximum of three signs on a pole, with the most important sign at the top. All signs have a reflective layer added on selected parts of the sign as is custom in European countries; most larger signs also have their own illumination.
Most signs are based on pictograms, with some exceptions like the prohibition-sign for stop at customs and signal and speed limit signs.
If the sign includes text, the text is written in Swedish, except the stop sign, which is written in English ("STOP").
Swedish road signs depict people with realistic (as opposed to stylized) silhouettes.
Major differences between Swedish and general European signs
Like other countries in Europe, Swedish signs follow the Vienna Convention on Road Signs and Signals.
Whereas European signs usually have white background on warning and prohibition signs, the Swedish signs have a yellow/orange colour. This is for the purpose of enhancing the visibility of the sign during the winter, as white signs would be hard to see in the snow. The prohibition signs have a red line across them if there is a symbol on them, not if it is a numeric value. General European prohibition signs do not usually have such a red line. Swedish warning and prohibition signs also have a thicker border than their European counterparts. Traffic signs in Slovenia and Finland are quite similar.
From Wikipedia (CC BY-SA 4.0).