In all other countries I know, motorways are the fastest type of road.
The speed limit is typically 130 km/h, but it can be as low as 100 km/h in some countries, but in those countries all other roads are then often limited to 80 km/h.
I think the Dutch situation on the photo is typical for mainland Europe: 50 in built-up areas, 80 on normal roads, 100 on dual carriage-ways, and 120 on motorways.
However, the UK is really odd (official speed limits converted to km/h and rounded): 48 in built-up areas, 97 on normal roads and 113 on both dual carriage-ways and motorways.
What’s going on? What’s the point of motorways if you can drive just as fast elsewhere?