Always choose your speed in accordance with road and weather conditions.
The speed limit in populated areas is usually 50 km/h.
Speed limit signs are not posted unless other speed limits apply. The speed limit is often 60 km/h on throughways. In residential areas it is usually only 30 km/h.
The rule of thumb in rural areas is that gravel roads have a speed limit of 80 km/h, and paved roads 90 km/h. In several places there are traffic signs indicating the recommended maximum speed and where drivers should realize that the permitted speed limit can’t be recommended because of the driving conditions.