What does this sign mean?

What does this sign mean?undefined
You can drive more than 100km/h if the road is clear
A rest area is 100m ahead
Don't drive slower than 100km/h
Don't drive faster than 100km/h - the speed limit is now the open road speed limit

This indicates the current speed limit on public roads for the vehicle you are driving. The speed limit for cars and motorcycles is 100 kilometers per hour, while other vehicles (such as heavy vehicles, vehicles towing trailers, school buses, agricultural vehicles, and others) have lower speed limits.