2 ms·
> that the ones with the red circle but without the red slash typically mean up to what is shown is allowed and anything above is not (e.g. maximum speed, maxim
by seszett 3y ago
> that the ones with the red circle but without the red slash typically mean up to what is shown is allowed and anything above is not (e.g. maximum speed, maximum width, maximum height)
These number are limits on a continuous domain, where inclusion or exclusion of the limit number itself is basically meaningless. The list of vehicles is a set (without necessarily a clear order) which has fundamentally different properties so it's not surprising the meaning is slightly different. You couldn't have a sign that forbids pedestrians and cars but allows motor vehicles otherwise.
The rules are simply that when a red on white sign displays anything other than a number (with or without a slash) it means this thing is forbidden. If it's a number it means a high limit.
- red_admiral 3y agoBack in the days when the League of Nations was deciding all this, there was a road sign in the German Empire consisting of a red circle around a white background with a black arrow pointing straight ahead (and no slash). This did not mean it's forbidden to go straight ahead, it meant it's _mandatory_ to go straight ahead - the thing that later on was changed to the white-on-blue arrow. (examples: https://de.wikipedia.org/wiki/Bildtafel_der_Verkehrszeichen_im_Deutschen_Reich_von_1938_bis_1945 https://de.wikipedia.org/wiki/Bildtafel_der_Verkehrszeichen_... but the sign must be older than that). If you want to be picky, the "you must" signs generally had a narrower red ring than the "you must not" ones, but even that rule is not always adhered to on the linked page.