You know when you follow a lorry on the motorway and you start wondering about things, well can anyone in the collective genius of readers of this explain what those round stickers are for on the back of the lorry with numbers in them (e.g. 50). Some lorries have multiple circles and some don't. My best guess is that it's something to do with speed limiters but I can't see why they need lots with different numbers in.
could it be because they go on continental roads too, so MPH and KPH?
Aren't they the different speeds that they can travel on different classes of roads?
50kph = speed limit for towns
70kph = speed limit for single carriageway
80kph = peed limit for dual carriageway
90kph = motorways
compulsary on french, for example, but not compulsary on british trucks
With love & peace Merman & Mermaid
Lots of people break the laws